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Can you build muscle without bulking—and could stored body fat help fuel the process? Dr. Milo Wolf joins me to unpack new research on the energetic cost of building muscle and what it means for losing fat while gaining or preserving muscle, even for experienced lifters. We discuss: • Why a calorie surplus may not be necessary for muscle growth. • His protein recommendations for body recomposition. • Balancing fat loss with muscle retention and recovery. • How little resistance training can still produce results. • Using lengthened partials, supersets, and drop sets to make workouts more efficient. Join me Friday for my solo recap and top takeaways! Thank you to our sponsor, AQUATRU! Get 20% off your AquaTru water purifier at AquaTru.com with code VANESSA! Includes a 30-day best-tasting water guarantee or your money back. SAVE ON THE PSMF LIBRARY™ & TONE LUX Explore the Protein-Sparing Modified Fasting Library™ and the Tone LUX red light therapy collection at Ketogenic Girl. Save 20% with code VANESSA  DISCLAIMER This podcast is for educational and informational purposes only and is not medical advice. Consult your healthcare professional before changing your diet, exercise routine, or supplement use. Guest opinions are their own, and individual results vary. This episode contains paid advertising and promotions for my own products. Some links may be affiliate links, meaning I may earn a commission at no additional cost to you.

Does increasing fat burning automatically mean losing more body fat? And what would we need to measure to know whether an intervention preserves muscle? In this Friday solocast, I'm revisiting my conversation with Dr. Amie Hornaman to unpack the research on T2, a lesser-known thyroid hormone derivative, and connect the mechanisms to the body composition questions we care about. We go inside the mitochondria to explore how fatty acids enter, how our cells regulate fuel use, and how mitochondrial uncoupling releases energy as heat. I also revisit the brown fat research and potential connections with ketogenic metabolism. Along the way, I clarify several findings from the interview—including what "50% less fat mass" meant in the rat study, why lower body weight does not establish fat-only loss, and why changes in muscle-cell metabolism do not prove muscle preservation. The T2 research is intriguing, but human evidence remains very limited. This recap explores what the findings suggest, what they cannot establish, and the practical steps we can take now to support muscle and metabolic health. BACK-TO-SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. In this episode, I discuss: What T2 is and how it relates to T3 and T4. What the 2005 rat study actually found about fat accumulation. The carnitine shuttle and how fatty acids reach the mitochondria. How AMPK, ACC, and malonyl-CoA help regulate fat oxidation. Mitochondrial uncoupling, ATP production, and heat generation. Brown fat thermogenesis and why an animal's thyroid status matters. Possible connections with keto—and why shared pathways do not establish added benefits. The difference between burning dietary fat and losing stored body fat. The two-participant human T2 report and Amie's uncontrolled 14-woman project. What stronger human research would need to measure. Thyroid safety questions and the importance of appropriate prescribed treatment. Lean mass versus skeletal muscle during weight loss. Practical ways to prioritize protein, resistance training, and consistency. Questions to bring to your clinician if you have persistent symptoms. Research discussed Lanni and colleagues, 2005: T2, fat accumulation, and liver fatty acid oxidation in high-fat-fed rats. Read the study Lombardi and colleagues, 2009: T2, skeletal muscle fatty acid oxidation, AMPK signaling, and thermogenesis. Read the study Antonelli and colleagues, 2011: Preliminary human report on resting metabolic rate and body weight in two participants. Read the study Cavallo and colleagues, 2013: Rapid liver-cell responses to T2 in hypothyroid rats. Read the study Lombardi and colleagues, 2015: Brown fat thermogenesis in hypothyroid rats. Read the study Additional research and resources Luukkonen and colleagues, 2020: A short human study of ketogenic eating, liver fat, and hepatic mitochondrial metabolism. Read the study Hall and colleagues, 2015: A controlled human study illustrating the distinction between increased fat oxidation and net body-fat loss. Read the study Longland and colleagues, 2016: Protein and exercise during an energy deficit. Read the study Padron and colleagues, 2014: T2 and thyroid suppression in rats. Read the study Jonas and colleagues, 2015: T2, thyroid regulation, and potential cardiac effects in mice. Read the study American Thyroid Association: Thyroid treatment and testing information. Thyroid hormone treatment | Thyroid function tests Listen to the full conversation with Dr. Amie Hornaman in the podcast feed. Thank you so much for spending this time with me! If you enjoyed the episode, please share it with a friend who loves understanding the science behind metabolism and body composition. Disclosure and medical disclaimer Dr. Amie Hornaman sells the T2-containing supplement discussed in the original interview. This recap is educational and does not endorse or recommend purchasing or taking it. Supplemental T2's long-term safety has not been established, and some animal studies have raised concerns about thyroid suppression and heart effects. Do not start T2, substitute it for prescribed treatment, or change your thyroid medication based on this episode. Consult a qualified healthcare professional about your individual circumstances.

What is T2, and why have researchers been investigating its effects on metabolism? In this episode of the Optimal Protein Podcast, I'm welcoming back Dr. Amie Hornaman to explore 3,5-diiodothyronine, commonly called T2—a lesser-known thyroid hormone derivative studied for its effects on energy expenditure, fatty acid oxidation, and mitochondrial function. Thank you to our sponsor, AirDoctor! Visit ⁠AirDoctorPro.com and use promo code VANESSA for up to $300 off select AirDoctor models, plus a free 3-year warranty. All AirDoctor air purifiers come with a 30-day money-back guarantee. We walk through research on liver cells, skeletal muscle, and brown fat, unpacking the machinery that helps fatty acids enter the mitochondria and a process called mitochondrial uncoupling, in which energy is released as heat. We also explore possible connections with ketogenic diets and the question that matters so much to us here: what could these findings mean for losing body fat while preserving muscle? Much of the research discussed comes from animal studies. We examine a small human report involving just two participants, and Amie shares observations from an uncontrolled group of 14 women who used her T2-containing product. These findings raise interesting questions, but they do not establish that supplemental T2 is a safe or effective approach to fat loss. BACK-TO-SCHOOL SALE! For a limited time, save 40% sitewide at ⁠ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. In this episode, we discuss: What T2 is and how it relates to the better-known thyroid hormones T3 and T4. The 2005 rat study reporting less fat accumulation and greater liver fatty acid oxidation. How the carnitine shuttle helps transport long-chain fatty acids into the mitochondria. AMPK, ACC, and malonyl-CoA—and their roles in regulating fat oxidation. Mitochondrial uncoupling, ATP production, and thermogenesis. Research on T2 and brown fat in animals with low thyroid function. Potential overlaps with ketogenic metabolism. The limited human evidence and the need for larger, controlled studies. Why increased fat burning, lower body weight, and muscle preservation are different outcomes. Protein, resistance training, and body composition during weight loss. Important context for interpreting the research The approximately 50% lower fat mass reported in the 2005 rat study was a comparison with the untreated high-fat-diet group. It does not mean the animals lost half of their starting body fat. The 2011 human report described approximately 4% lower body weight, not proof that all weight lost was fat. Neither that report nor the uncontrolled 14-woman project establishes long-term safety or that T2 caused the reported changes. Changes in muscle-cell fuel use do not establish muscle preservation during weight loss. Shared metabolic pathways also do not establish that combining keto and T2 provides additional benefits. Studies discussed Lanni and colleagues, 2005: T2, fat accumulation, and liver fatty acid oxidation in rats receiving a high-fat diet. ⁠Read the study Lombardi and colleagues, 2009: T2, skeletal muscle fatty acid oxidation, AMPK signaling, and thermogenesis in rats. ⁠Read the study Antonelli and colleagues, 2011: Preliminary human report on T2, resting metabolic rate, and body weight in two participants. ⁠Read the study Cavallo and colleagues, 2013: Rapid effects of T2 on fatty acid oxidation and mitochondrial function in liver cells from hypothyroid rats. ⁠Read the study Lombardi and colleagues, 2015: T2 and brown adipose tissue thermogenesis in hypothyroid rats. ⁠Read the study Additional safety references Padron and colleagues, 2014: T2 administration, central hypothyroidism, and effects on thyroid-sensitive tissues in rats. ⁠Read the study Jonas and colleagues, 2015: T2's effects on thyroid regulation, body composition, energy metabolism, and heart weight in mice. ⁠Read the study Thank you so much for listening! If you enjoyed exploring the science with us, please share this episode with a friend who loves learning about metabolism and body composition. Join me on Friday for my solocast recap, where I'll revisit the key mechanisms, clarify what the studies do and don't show, and connect the discussion to practical takeaways for supporting muscle and metabolic health. Guest disclosure and medical disclaimer Dr. Amie Hornaman sells the T2-containing supplement discussed. This episode is educational and does not endorse or recommend purchasing or taking it. Some animal studies have raised concerns about thyroid suppression and heart effects; availability without a prescription does not establish safety. Do not start T2, substitute it for prescribed treatment, or change your thyroid medication based on this episode. Consult a qualified healthcare professional about your individual circumstances. Correction: In the mitochondrial uncoupling discussion, we meant DNP, not DMT.

Burn More Fat—But Are You Losing It? 7 Takeaways on Metabolic Flexibility & Protecting Muscle Does becoming a better fat burner automatically mean you're losing more body fat? And do higher ketones mean better results? In today's episode, I'm unpacking seven of my biggest takeaways from my conversation with Dr. Mike T. Nelson about metabolic flexibility, sustainable fat loss, and protecting your hard-earned muscle. I'm sharing what I learned the hard way during my own keto journey—including how I gained weight despite having high ketones—and why understanding the difference between burning dietary fat and losing stored body fat can change how you approach your goals. We're also exploring how to adjust carbohydrates to support your training, why fasted cardio is optional, and how small, manageable food changes can help you make progress while still enjoying your meals and your life! In this episode, we explore: What metabolic flexibility really means: Using fat and carbohydrates effectively and switching between fuels as your needs change. Fat burning versus fat loss: Why increased fat oxidation and higher ketones don't automatically mean you're losing stored body fat. Calories, hunger, and sustainability: Why an energy deficit matters—and why how you feel while creating it matters, too. Matching carbohydrates to your training: How your activity, intensity, preferences, and recovery can guide your fueling choices. Fasted cardio and the "fat-burning zone": Why the fuel you use during a workout doesn't tell the whole story about long-term fat loss. Protecting muscle while losing weight: The combined importance of protein, resistance training, and recovery, plus a discussion of protein-sparing modified fasting and its limitations. Building capacity beyond the scale: Tracking strength, aerobic fitness, energy, and recovery alongside changes in body weight. I also share the gentle nutrition adjustments I'm making during breastfeeding and why this is a different approach from aggressive dieting or protein-sparing modified fasting. You don't have to optimize everything at once. Choose one takeaway you can put into practice this week—whether that's tracking your weights and reps, making a simple food swap, or fueling your workouts in a way that helps you feel your best. Listen to the full conversation For the deeper dive, listen to my interview with Dr. Mike T. Nelson: Burning Fat vs. Losing Fat: Metabolic Flexibility Explained with Dr. Mike T. Nelson. Resources & special offer By popular request, the Back to School Sale has been extended for one more week! Save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40. Explore: The Protein Sparing Modified Fasting Library: High-protein recipes, grocery lists, meal frameworks, instant digital access, a premium printed edition, and community access. Tone LUX Red Light Therapy: Discover the Sapphire, Diamond, and Gem panels, plus the Crystal mask and Contour neck and décolleté accessory. Tone Device: Explore the breath ketone device discussed in the episode. Let's connect Which takeaway resonated with you most? Have you ever assumed higher ketones meant greater fat loss, or found that changing your fuel intake helped your training? I would love to hear from you! If you enjoyed this episode, please follow the Optimal Protein Podcast and leave a rating or review. Thank you so much for listening and being part of this community! Disclaimer: This podcast is for educational purposes only and is not medical advice. Consult your healthcare provider before changing your diet, fasting, or exercise routine. Aggressive calorie restriction and protein-sparing modified fasting are not presented as approaches for breastfeeding listeners. Individual results vary.

Does burning more fat for fuel mean you're actually losing more body fat? And if you're in ketosis, does that mean the fat you're burning is coming from your body—or from the food you just ate? Today on the Optimal Protein Podcast, I'm joined by Dr. Mike T. Nelson to unpack this important distinction and explore what metabolic flexibility really means for fat loss, muscle preservation, and performance. BACK-TO-SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Mike holds a PhD in exercise physiology and a master's degree in mechanical engineering with a focus on biomechanics. In this fascinating conversation, we explore your body's ability to use both carbohydrates and fat, switch between them, and adapt to different demands. We discuss why burning more fat during a workout doesn't necessarily translate into greater body-fat loss, why calorie balance still matters, and how your nutrition and training can work together to support body recomposition. I also share my own experience gaining weight on keto despite high ketone readings—and what that taught me about dietary fat versus stored body fat. In this episode, we discuss: • The three components of metabolic flexibility—and why using carbohydrates effectively matters, too • Burning fat versus losing fat: the distinction that can change how you approach your goals • How insulin and fuel availability influence what your body burns • Why higher ketone readings don't necessarily mean greater body-fat loss • Fasted cardio: what the research suggests and where questions remain • Long-term keto and the potential tradeoffs for high-intensity exercise • Adjusting carbohydrates to support your training performance • Protein-sparing modified fasting and the considerations around more aggressive calorie deficits • Why stubborn lower-body fat can be especially frustrating for women • Protein and resistance training: their roles in preserving lean mass while dieting • Building aerobic fitness to support metabolic flexibility over time • Heat, cold exposure, and Mike's broader framework of physiologic flexibility • Lactate as a valuable fuel and the emerging interest in lactate supplements • Tracking performance alongside the scale—and keeping maintenance in mind from the beginning I loved Mike's emphasis on building a body that can perform well while you work toward your body-composition goals. This episode is full of thoughtful distinctions to help you better understand the science behind fat loss! Connect with Dr. Mike T. Nelson: Instagram: @drmiketnelson Explore his newsletter for more on body composition, performance, and metabolic flexibility. Special offers mentioned in this episode: Save 40% sitewide at ⁠KetogenicGirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library and Tone Device. Australia and New Zealand listeners: save 75% during the warehouse moving sale with code WAREHOUSE75. If you enjoyed this episode, please subscribe, leave a rating or review, and share it with a friend. Your support helps us continue bringing you conversations with leading researchers and experts in protein, metabolic health, and body composition. Follow @ketogenicgirl and @optimalproteinpodcast on Instagram, and join the Optimal Protein Podcast Facebook group for more discussion. The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements, or exercise regimen.

Can you gain lean tissue while losing body fat? And if two people eat the same number of protein grams, will they necessarily get the same body composition results? In this episode, Vanessa shares six takeaways from her conversation with Dr. Drew Gonzalez on the science of fat loss, muscle retention, protein quality, creatine, and sustainable nutrition. BACK-TO-SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com⁠ with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. A 12-week study discussed in the interview found that adults combining an exercise and weight-loss program with creatine gained lean tissue while reducing body fat. Vanessa unpacks why that result is exciting, what "lean tissue" actually measures, and why the change in body fat percentage needs careful interpretation. In this episode: Why the quality of weight loss matters more than the number on the scale alone What the creatine study found about lean tissue and body fat during a weight-loss program Whether protein quality may matter more when calories are limited What a study comparing pork- and soy-based meals in military cadets found about recovery How much protein Dr. Gonzalez suggests as a practical starting goal for people who resistance train Why you don't need perfectly timed or evenly divided protein meals What firefighter research can—and cannot—tell us about time-restricted eating Where the evidence stands on creatine and cognition, probiotics, and other emerging supplements The central question: How can you lose body fat while giving yourself the best chance of maintaining—or even gaining—lean tissue? Listen to Vanessa's full interview with Dr. Drew Gonzalez for the complete conversation. Follow @ketogenicgirl and @optimalproteinpodcast on Instagram, and join the Optimal Protein Podcast Facebook group to continue the discussion. BACK-TO-SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com⁠ with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements, or exercise regimen.

Can you lose body fat while gaining lean tissue—even during a calorie deficit? And could the quality of your protein change how well you recover and protect muscle? Vanessa is joined by exercise and nutrition researcher Dr. Drew Gonzalez to explore new research on creatine, body recomposition, protein quality, and what it takes to make weight loss more than a lower number on the scale. Try my favorite electrolytes! Cure Hydration. Visit curehydration.com/VANESSA and use code VANESSA for 20% off. Now available on Amazon! They begin with a 12-week study in middle-aged and older adults that tested creatine alongside exercise and a weight-loss diet. Vanessa and Dr. Gonzalez discuss the promising body-composition findings, why gaining lean tissue is not necessarily the same as gaining that amount of muscle, and what the study can—and cannot—tell us about fat loss and cognitive health. They also explore research comparing pork- and soy-based meals during intense training, the role of essential amino acids and leucine when calories are limited, and practical protein targets for people who want to lose fat without unnecessarily losing muscle. In this episode: What a new creatine study found about lean tissue and body fat during weight loss Whether someone eating plenty of meat still stands to benefit from creatine supplementation What we know—and don't yet know—about higher creatine doses and brain health Why two diets with the same protein grams may differ in essential amino acid content What Dr. Gonzalez's military cadet study found about protein sources and recovery How much protein to aim for while resistance training and losing body fat Whether protein needs to be evenly distributed across meals What firefighter research reveals about time-restricted eating in demanding real-world conditions Whether probiotics and synbiotics meaningfully add to a structured fat-loss program The goal isn't simply to lose weight. It's to improve what you lose—and what you keep. BACK-TO-SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Follow @ketogenicgirl and @optimalproteinpodcast on Instagram, and join the Optimal Protein Podcast Facebook group for more discussion. The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements, or exercise regimen.

Vanessa breaks down the biggest scientific takeaways and most actionable gems from her recent conversation with body-composition expert and author Lyle McDonald. Why does fat come off easily from some areas while other areas seem determined to hold on? And can we influence stubborn fat loss without simply getting leaner everywhere else? Create your own custom protein blend at truenutrition.com/vanessa and use code VANESSA for 20% off your first order. Let Vanessa know what your custom blend is! Now shipping internationally. Vanessa explores the physiology of stubborn body fat, including fat mobilization, blood flow, oxidation and alpha-2 receptors, and why women in particular may notice their upper body becoming lean long before their hips and thighs. She also breaks down Lyle's newest approach, Intermittent Modified Fasting, and how alternating protein-focused, low-calorie days with maintenance days may offer a more flexible way to create a calorie deficit while prioritizing muscle retention. Vanessa explains why protein becomes especially important during aggressive calorie restriction, why a maintenance day is different from a "cheat" or "feast" day, and how meal timing, appetite and ketosis can influence how sustainable a fat-loss phase feels. She also examines Lyle's proposed strategies for addressing stubborn fat—including lower-carbohydrate eating and combining higher-intensity intervals with lower-intensity activity—while separating established physiology from strategies that still require more research. YOHIMBINE SAFETY NOTE: Yohimbine is discussed in this episode for educational purposes only and is not being recommended for use. Yohimbine can cause significant side effects, including anxiety, increased heart rate and blood pressure, and may interact with medications. It should not be used during pregnancy or breastfeeding. Anyone considering yohimbine should first consult with a qualified healthcare professional. Finally, Vanessa explores the scientific mechanisms behind yohimbine and alpha-2 receptors for educational purposes, red-light therapy and blood flow, whether slower weight loss could help preserve facial fullness, and why having a maintenance strategy may be just as important as having a fat-loss strategy. In this episode: Why some areas of body fat are more resistant to fat loss Why women may lose upper-body fat before hip and thigh fat Alpha-2 vs. beta receptors and stubborn-fat physiology Fat mobilization vs. fat oxidation vs. actual body-fat loss Why blood flow matters in stubborn fat stores Protein-Sparing Modified Fasting (PSMF) explained Lyle's Intermittent Modified Fasting approach Why protein matters on very-low-calorie days Maintenance days vs. cheat or feast days How to structure lower-calorie and maintenance days around training and life Why meal timing should help manage your appetite Time-restricted eating vs. intermittent modified fasting Protein, ketosis, satiety and food preoccupation Lower-carbohydrate eating and stubborn-fat mobilization Higher-intensity intervals followed by lower-intensity activity Why walking may fit into Lyle's stubborn-fat protocol Why more cardio is not necessarily better during aggressive dieting Red-light therapy, blood flow and what the evidence does—and does not—show Yohimbine, alpha-2 receptors and important safety considerations Why mobilizing more fat does not guarantee greater fat loss Resistance training and preserving lean mass during fat loss How to create a long-term weight-maintenance range Why small course corrections may help prevent larger weight regain Can slower weight loss help preserve facial fullness? Genetics, aging and individual patterns of fat loss Why your leanest possible weight may not be where you look or feel your best Vanessa's practical takeaways for sustainable fat loss and body recomposition BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. Follow @ketogenicgirl and @optimalproteinpodcast on Instagram to see visuals and posts mentioned on the podcast. Link to join the Facebook group for the podcast. The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements or exercise regimen.

Why does body fat disappear quickly from certain areas while seeming almost impossible to lose from others? BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library™, ToneLUX Red Light Therapy Collection and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. In today's episode of the Optimal Protein Podcast, Vanessa welcomes renowned author and body-composition expert Lyle McDonald to explore the fascinating physiology of stubborn body fat. Where we store our most resistant fat varies from person to person. For some women, it may be concentrated around the hips and thighs; for others, it may be the abdomen, arms or another area. Men may also struggle with stubborn fat, commonly around the abdomen and lower back. Lyle explains how differences in alpha-2 and beta receptors, blood flow, insulin sensitivity and catecholamine activity can make certain fat stores more difficult to access than others. They break down the three essential steps required to lose stored body fat: mobilizing fatty acids from the fat cell, transporting them away and ultimately oxidizing them for energy. Try my favorite new electrolytes, Cure Hydration! Head to curehydration.com/VANESSA and use code VANESSA to save 20% on your order. 💙 Now available on Amazon! Vanessa and Lyle also discuss whether low-carbohydrate eating, ketosis, high-intensity intervals and strategically timed low-intensity activity may help improve stubborn-fat mobilization. Lyle introduces his new book, Intermittent Modified Fasting, and explains how alternating protein-sparing modified fasting days with maintenance days may support fat loss, muscle retention, training performance and long-term adherence—without dieting continuously. Yohimbine can cause anxiety, increased heart rate, blood-pressure changes and other adverse effects, and may interact with medications. This podcast discusses the scientific rationale behind alpha-2 receptor antagonists, including yohimbine, for educational purposes only—not as a recommendation for use. Yohimbine is not appropriate for everyone, particularly people with certain medical conditions, and should not be used during pregnancy or breastfeeding. Consult a qualified healthcare professional before considering its use. In this episode, they discuss: • Why certain areas of body fat are more resistant than others • How stubborn-fat patterns differ between individuals • Why some women struggle most with hip and thigh fat • Why the abdomen and lower back are common stubborn areas in men • Alpha-2 versus beta receptors and how they affect fat mobilization • Why blood flow matters when attempting to access stubborn fat • The three steps required to mobilize and burn stored body fat • Why the face and upper body may become lean before stubborn areas • Whether slower weight loss may help preserve facial fullness • How low-carbohydrate eating may influence alpha-2 receptors • Why high-intensity intervals may improve stubborn-fat mobilization • Pairing short intervals with low-intensity cardio or walking • Why a calorie deficit is still required for net fat loss • Protein-sparing modified fasting versus conventional fasting • Why many alternate-day fasting plans provide too little protein • How to alternate modified fasting days with maintenance days • Why "maintenance day" may be more helpful than "feast" or "cheat day" • Using PSMF days to support long-term weight maintenance • Ketosis, appetite suppression and the metabolic fasting response • Yohimbine HCl, alpha-2 receptors and important safety concerns • Pregnancy, breastfeeding and changes in female fat distribution If you have ever wondered why one part of your body becomes lean while another area remains frustratingly resistant, this episode explains the biology of stubborn fat—and the strategies that may help create a more balanced pattern of fat loss. Today's episode is brought to you by Cure Hydration. Learn more about Lyle and his books at bodyrecomposition.com and store.bodyrecomposition.com. Follow @ketogenicgirl and @optimalproteinpodcast on Instagram to see visuals and posts mentioned on the podcast. Join the Facebook group for the podcast. The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult a healthcare professional before making significant changes to your diet, supplements or exercise regimen.

Vanessa breaks down the biggest scientific takeaways and most actionable gems from her recent conversation with Dr. Lee Breen, one of the world's leading researchers in protein metabolism, resistance training and skeletal muscle health across the lifespan. Before diving into the latest research, Vanessa shares an exciting update from her postpartum fat-loss and body-recomposition journey: she has lost five pounds since beginning her gentle fat-loss phase two weeks ago. She explains the four simple food swaps that reduced her intake by only approximately 150–200 calories per day, why the initial change likely includes water and glycogen as well as body fat, and how she is using three to four resistance-training sessions per week to gradually reveal her muscle while continuing to exclusively breastfeed baby Taylor. Vanessa also shares why she is deliberately giving herself the longest possible runway, why she does not expect to continue losing five pounds every two weeks, and why she plans to wait until Taylor begins eating solid foods before bringing Protein-Sparing Modified Fasting days back into her routine. BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. One of the biggest themes from Dr. Breen's research is that losing weight and improving your body composition are not necessarily the same thing. Vanessa explores why the scale cannot tell you whether you are losing fat, water or metabolically active tissue; how much lean mass may be lost during significant weight loss; and why regaining weight after dieting or discontinuing a GLP-1 medication could potentially leave someone with less muscle and a higher body-fat percentage than when they started. She also examines how much protein may be needed to protect muscle during weight loss. Is approximately 1.4 grams per kilogram enough, or should you aim closer to 2–2.2 grams per kilogram? And how should that target change based on your body size, activity level, age and the aggressiveness of your calorie deficit? Create your own custom protein blend at truenutrition.com/vanessa and use code VANESSA for 20% off your first order. Let Vanessa know what your custom blend is! Now shipping internationally. Vanessa explains why protein and resistance training are most powerful when used together, why at least two whole-body resistance-training sessions per week can provide an effective starting point, and how training tells the body where the amino acids from dietary protein are needed. She also unpacks Dr. Breen's research comparing whey and pea protein in middle-aged and older adults. Whey produced a greater leucine response—but did that translate into more muscle protein synthesis over the complete 10-day intervention? The full results were more nuanced than a simple animal-versus-plant-protein conclusion. They also revealed something potentially even more important about the effect of resistance training on the muscle's ability to use the protein being consumed. Vanessa finishes with Dr. Breen's fascinating prehabilitation research showing that a single resistance-training session helped protect older adults' muscle during five days of bed rest, emerging evidence on whey protein and glycemic control, and the essential questions anyone using a GLP-1 medication should consider to help protect muscle and improve the quality of their weight loss. In this episode: Vanessa's latest postpartum fat-loss and body-recomposition update How she lost five pounds during her first two weeks of gentle dieting Why those five pounds are unlikely to represent body fat alone The four simple swaps that reduced her intake by approximately 150–200 calories per day Why she expects her rate of weight loss to slow from here How she is approaching fat loss while exclusively breastfeeding Why she is deliberately giving herself a longer fat-loss runway Her goal of protecting her muscle—and potentially more facial fat and collagen—this time Why she is waiting until Taylor begins solid foods before reintroducing PSMF days How three to four weekly resistance-training sessions are supporting her body recomposition Why she plans to complete another DEXA scan at the end of the process Why losing weight and improving body composition are not necessarily the same thing How much lean mass may be lost during significant weight loss Why lean mass loss is not always identical to contractile-muscle loss What may happen to body composition when lost weight is regained The potential consequences of losing fat and muscle but regaining predominantly fat Why the scale should not be your only measure of progress DEXA scans, measurements, strength, performance, photographs and clothing fit Why muscle preservation must be built into a fat-loss plan from the beginning Is 1.4 grams of protein per kilogram enough during weight loss? When 2–2.2 grams per kilogram may provide additional muscle protection Why the conventional protein RDA should not be treated as an optimal fat-loss target When goal weight, adjusted body weight or estimated lean mass may provide a more appropriate calculation Why protein and resistance training work better together How training helps your muscles use the amino acids you consume Why two whole-body resistance-training sessions per week can be an effective starting point How to begin resistance training without a complicated program or gym membership Why breakfast may be the most important protein meal to improve The potential benefits of approximately 0.4 grams of protein per kilogram per meal How to create a breakfast containing approximately 25–40 grams of protein Why two eggs may not provide as much protein as many people assume When protein's appetite-suppressing effect is helpful—and when it may not be Why an enormous protein shake could be counterproductive for a frail older adult with a low appetite Whey protein vs. pea protein in Dr. Breen's latest research Why whey produced a greater leucine response Did the higher leucine response produce more muscle protein synthesis? Why well-planned plant protein can still support muscle remodeling When protein quality may become more consequential Why nothing has consistently outperformed whey protein Why whey can be especially efficient when calories or appetite are limited The benefits of a "food first, but not food always" approach When a protein supplement can be a practical tool Why ingredient quality and third-party testing matter Could one resistance-training session help protect muscle for five days? What prehabilitation may mean before planned surgery or predictable inactivity How Vanessa used a similar strategy before delivering her babies Why building muscle now creates a reserve for future illness, injury or inactivity Can whey protein help improve post-meal glycemic control? Why the idea that whey is automatically bad for blood sugar because it stimulates insulin is overly simplistic Previous research using approximately 15 grams of whey with or before carbohydrate-rich meals Dr. Breen's ongoing trial in adults over 75 with obesity and type 2 diabetes The difference between completed findings and promising ongoing research Why protein, resistance training and diet quality become more important—not less—when using a GLP-1 medication The questions every GLP-1 user should consider about protein, strength, fiber, micronutrients and long-term maintenance Vanessa's practical action plan for losing fat while protecting muscle BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. Follow @ketogenicgirl and @optimalproteinpodcast on Instagram to see visuals and posts mentioned on this podcast. Link to join the Facebook group for the podcast The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements or exercise regimen.

When the scale goes down, how much of that weight is actually body fat—and how much could be metabolically active muscle? BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. In today's episode of the Optimal Protein Podcast, Vanessa welcomes leading protein and muscle researcher Dr. Leigh Breen back to discuss how to protect lean mass during weight loss. They examine an important concern surrounding traditional dieting and GLP-1-assisted weight loss: people may lose muscle alongside body fat, yet regain predominantly fat afterward. Could repeated cycles of weight loss and regain ultimately leave someone with worse body composition? Try my favorite new electrolytes, Cure Hydration! Head to curehydration.com/VANESSA and use code VANESSA to save 20% on your order. 💙 Now available on Amazon! Vanessa and Dr. Breen also explore how much protein we may actually need, whey versus plant protein, anabolic resistance, the importance of leucine, and why breakfast may be the biggest missed opportunity for protein. They also discuss his fascinating "prehabilitation" research showing how one resistance-training session helped protect older adults' muscle during five days of bed rest. In this episode, they discuss: • How much protein may help preserve muscle during weight loss • Why scale weight cannot reveal whether you are losing fat or muscle • Muscle loss during GLP-1-assisted weight loss • What may happen when lost weight is regained • Protein and resistance training for protecting lean mass • Whey versus pea protein for muscle anabolism • Why the leucine response matters • When protein quality becomes increasingly important • What anabolic resistance is and how to overcome it • How much protein older adults may need per meal • Why breakfast is often the weakest link in protein intake • How one workout before bed rest helped protect muscle • The potential benefits of "prehab" before planned inactivity • How whey protein may support post-meal glucose control If your goal is to lose body fat while preserving metabolically active muscle, this episode explains why the quality of your weight loss matters just as much as the number on the scale. Today's episode is brought to you by Cure Hydration. Cure is a delicious electrolyte drink mix made with real ingredients to support hydration whether you're exercising, traveling, or simply trying to stay hydrated throughout the day. Save 20% with code VANESSA at curehydration.com/VANESSA. Now available on Amazon! Follow @ketogenicgirl and @optimalproteinpodcast on Instagram to see visuals and posts mentioned on this podcast. Join the Facebook group for the podcast⁠. The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements, or exercise regimen.

Vanessa breaks down the most surprising and practical lessons from her recent conversation with Dr. Amanda Paluch on daily steps, walking, cardiovascular health, longevity, fat loss, and body recomposition. She also shares a personal update on her current postpartum fat-loss journey — including exactly what she is doing right now, how much progress she has made, what she is prioritizing with calories, protein, resistance training and daily movement, and why she has decided not to rush back into PSMF days just yet. One of the biggest themes from the Amanda Paluch conversation is that the way many of us think about daily steps may be far more rigid than the science actually supports. Vanessa unpacks the surprising origin of the 10,000-step goal, what the research really suggests about how much movement is enough, and why your current step count may be more meaningful than you think. BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. Vanessa also explores why the people doing the least activity may actually have the most to gain, whether you really need long dedicated walks, and how everyday movement fits into a smart fat-loss and body-recomposition strategy. She also breaks down how walking works alongside resistance training, why more is not always better, and which common assumptions about intensity, timing, step trackers, and daily movement may not hold up the way you expect. Create your own custom protein blend at truenutrition.com/vanessa and use code VANESSA for 20% off your first order. Let Vanessa know what your custom blend is! Now shipping internationally. The episode finishes with a look at sedentary behavior, the "active couch potato" phenomenon, walking after meals, wearable accuracy, and why movement may be doing much more for your health than simply burning calories. In this episode: Vanessa's current fat-loss and body-recomposition update How much progress she has made so far Exactly what she is doing right now Why she is deliberately taking a slower postpartum approach Why she is waiting before bringing PSMF days back in Do you really need 10,000 steps per day? Where did the 10,000-step goal actually come from? How much movement may be enough for meaningful health benefits? Why starting from a lower baseline may matter more than you think Do household steps really count? Walking pads vs. outdoor walking Does walking faster actually matter? Is more always better? How walking fits into fat loss and body recomposition Why resistance training and daily movement serve different roles What is an "active couch potato"? How much can you trust your Apple Watch, Fitbit, or Garmin? Does it matter when you walk? Are post-meal walks uniquely beneficial? Why movement supports far more than weight loss Protein Powder Guide BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. Follow @ketogenicgirl and @optimalproteinpodcast on Instagram to see visuals and posts mentioned on this podcast. Link to join the Facebook group for the podcast The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements, or exercise regimen.

How many steps do you actually need every day—and do you really need 10,000 steps to support fat loss, health and body recomposition? BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. In today's episode of the Optimal Protein Podcast, Vanessa sits down with physical activity researcher Dr. Amanda Paluch to unpack what the science really says about daily steps, walking, energy expenditure, appetite, fat loss and longevity. One of the biggest surprises? The famous 10,000-steps-per-day goal was not originally based on scientific research. Vanessa and Dr. Paluch dive into what the latest research actually suggests about optimal daily step counts, why benefits can occur well below 10,000 steps, and how walking can fit into a smart body-recomposition strategy. Try my favorite new electrolytes Cure Hydration! Head to curehydration.com/VANESSA and use code VANESSA to save 20% on your order. 💙 Now available on Amazon! They also explore why adding more activity does not always lead to the amount of weight loss we might mathematically expect, how the body can compensate for increases in energy expenditure, and why low levels of daily movement may affect appetite regulation and fat gain. In this episode, they discuss: • Where the 10,000-steps-per-day recommendation actually came from • Whether 10,000 steps is really necessary • How many daily steps are associated with meaningful health benefits • Why the ideal step target may differ depending on age • Whether benefits continue increasing beyond 10,000 steps • Why increasing steps from a very low baseline may provide especially large benefits • Walking and daily energy expenditure • How increasing daily movement can support fat loss • The role of steps during a body-recomposition phase • Why exercise sometimes produces less weight loss than expected • Energy compensation and how the body responds to increased activity • Whether increased exercise can influence appetite and food intake • The relationship between sedentary behavior, appetite regulation and fat gain • NEAT and why movement outside of formal workouts matters • Whether walking speed matters as much as total step count • Step volume versus exercise intensity • Whether sitting less matters even if you already exercise • Why walking and resistance training serve different purposes for body composition • Whether you need to hit the same step target every day • Simple, realistic ways to increase daily movement without adding another formal workout If your goal is to lose body fat while preserving or building metabolically active muscle, this episode breaks down one of the simplest and most accessible tools available: walking. And perhaps most importantly, you do not need to be perfect or hit an arbitrary number every single day. Moving from less activity to more activity can be incredibly meaningful—and the biggest gains may come simply from getting off the lowest end of the activity spectrum. BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. Follow @ketogenicgirl and @optimalproteinpodcast on Instagram to see visuals and posts mentioned on this podcast. Link to join the Facebook group for the podcast The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements, or exercise regimen.

Vanessa breaks down 7 of the biggest science-backed lessons from her recent conversation with Dr. Cassandra Evans on protein, body recomposition, fat loss, muscle preservation, genetics, caffeine, and women's iron health. BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. Vanessa explains why higher protein intake becomes especially important during fat loss, how it can help preserve lean mass, improve satiety, and in some cases even support muscle gain while losing body fat. She also breaks down protein-overfeeding research suggesting that extra calories from protein may affect body composition differently than overfeeding on fat or carbohydrates. Create your own custom protein blend at truenutrition.com/vanessa and use code VANESSA for 20% off your first order. Let Vanessa know what your custom blend is! Now shipping internationally. Vanessa also covers why high-protein diets do not appear to harm bone health, how the FTO "obesity gene" may influence hunger and food intake, and why regular exercise may reduce some of the differences associated with genetic risk. The episode finishes with caffeine myths, energy drinks, lactoferrin, hepcidin, and emerging research around iron status in women. In this episode: How much protein do you need during fat loss? Can you gain muscle while losing body fat? Why higher protein helps preserve lean mass Protein, satiety, and diet adherence What protein-overfeeding studies reveal   BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. Follow @ketogenicgirl and @optimalproteinpodcast on Instagram to see visuals and posts mentioned on this podcast. Link to join the Facebook group for the podcast The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements, or exercise regimen.

Dr. Cassandra Evans joins Vanessa to break down the science of protein, body recomposition, fat loss, muscle preservation, genetics, caffeine, and women's iron health. BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. They discuss how much protein may be optimal during body recomposition and fat loss, including research showing that higher-protein diets can help preserve lean mass, improve satiety, and in some cases even support muscle gain while losing body fat. Cassandra also shares fascinating protein-overfeeding research suggesting that increasing calories from protein may affect body composition very differently than overfeeding on fat or carbohydrates. They break down the myth that high-protein diets are harmful to bone health, including research in resistance-trained women, and explore the FTO "obesity gene," how it may influence hunger and food intake, and why exercise appears to reduce some of the differences associated with genetic risk. Try my favorite new electrolytes Cure Hydration! Head to curehydration.com/VANESSA and use code VANESSA to save 20% on your order. 💙 Now available on Amazon! Vanessa and Cassandra also discuss caffeine and energy drinks, why caffeine appears to be doing most of the heavy lifting for performance and cognition, and common myths around caffeine and hydration. They finish with Cassandra's emerging research on lactoferrin and iron status in women, including how lactoferrin may influence hepcidin, iron utilization, gut health, pregnancy, postpartum health, and menopause. In this episode: How much protein do you need for body recomposition? Can you gain muscle while losing fat? How protein helps preserve lean mass during a calorie deficit Why higher protein may support greater fat loss What protein-overfeeding studies reveal Why resistance training is critical during fat loss Are high-protein diets bad for bone health? The FTO "obesity gene" explained How exercise may reduce genetic risk Energy drinks versus caffeine Does caffeine dehydrate you? Dr. Evans' evidence-based supplement routine Iron deficiency in active, pregnant, and postpartum women What lactoferrin is and how it affects iron metabolism Why more iron is not always better Emerging lactoferrin research in women's health and menopause BACK TO SCHOOL SALE! For a limited time, save 40% sitewide at ketogenicgirl.com with code BACKTOSCHOOL40, including the Protein-Sparing Modified Fasting Library, ToneLUX Red Light Therapy Collection, and Tone Breath Ketone Analyzer. Australia, New Zealand & Southeast Asia: Save 75% on available ToneLUX and Tone products during the warehouse moving sale with code WAREHOUSE75, while supplies last. Follow @ketogenicgirl and @optimalproteinpodcast on Instagram to see visuals and posts mentioned on this podcast. Link to join the Facebook group for the podcast The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet, supplements, or exercise regimen.