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If you have POTS, you’ve probably heard conflicting explanations for your symptoms, each presented as the answer. How do you sort through the noise and figure out what actually applies to you? In this episode of Brain Body Reset, Dr. Spencer Zimmerman is joined by Dr. Howard Snapper, a respected cardiologist, president-elect of the American Autonomic Society, and autonomic specialist practicing in the Atlanta, Georgia, area. Together, they unpack common POTS myths, misleading claims, and the truths that sometimes get stretched too far. We explore: What POTS is from a diagnostic standpoint, and how it differs from orthostatic hypotension.Craniocervical instability, mast cell activation syndrome (MCAS), and compression syndromes.Why a condition may matter for some patients without explaining everyone’s symptoms.Why finding one contributing problem doesn’t necessarily mean you’ve found the whole answer.The goal is to help you ask better questions, understand the limits of broad claims, and pursue care that reflects your individual needs. Connect with Dr. Snapper: Facebook X: @howardsnapper

If you have POTS or another form of dysautonomia, you’ve probably been told to increase salt, push fluids, wear compression, and maybe try a medication or two. That advice isn’t wrong, but it’s compensation, not correction. And for most people, it’s a forever strategy. In this episode, Dr. Spencer Zimmerman, a dual-licensed nurse practitioner and doctor of chiropractic, walks through the research on a system that is almost never evaluated in POTS, Long COVID, ME/CFS, or hypermobile EDS: the vestibular system. Most people think of the vestibular system as balance and vertigo. But the gravity-sensing otolith organs feed directly into the brainstem’s cardiovascular centers. When you stand up, this vestibulosympathetic reflex fires before your blood pressure has a chance to drop, constricting blood vessels and activating the leg muscles that pump blood back to the heart. It responds roughly twice as fast as the baroreceptor reflex that most POTS models focus on. When that early-warning system isn’t working, blood pools, less returns to the heart and brain, and the heart races to compensate. That racing heart is the downstream effect, not the root problem. Dr. Zimmerman connects this to a 2026 paper framing POTS, ME/CFS, and Long COVID as neuroimmune disorders, research showing brainstem inflammation in Long COVID near vagal and vestibular centers, a study showing otolith stimulation changes blood flow to the brain independent of blood pressure or breathing, and astronaut research where reduced gravity weakens the otoliths and produces POTS-like orthostatic intolerance on return to Earth. He then gets practical: what testing should be done (and why video-recorded eye movement testing should be the minimum standard), why generic habituation-based vestibular rehab often makes this population worse, and what a complete plan looks like. That includes visual and vestibular work, cervical spine and proprioception, heart-rate-guided progression, and addressing “sabotagers” like mast cell activation, anemia, thyroid, hormones, and gut issues. Key takeaways What triggers POTS (infection, surgery, injury) is different from what keeps it goingThe vestibular system directly regulates blood vessel tone, heart rate, the skeletal muscle pump, and blood flow to the brainTachycardia in POTS is a compensation for upstream dysfunction, which is why rate-lowering medications rarely make people feel truly wellResearch shows reduced brain blood flow appears about two minutes before nausea sets in, which is why measuring physiology beats waiting for symptoms in sensitive patients“Normal” and “no pathology” are not the same thing; you can have intact balance and still have impaired vestibular functionStandard vestibular rehab is built for conditions like BPPV and relies on pushing through symptoms, which backfires in dysautonomiaThe best outcomes come from treating vision, vestibular, cervical, proprioceptive, and whole-body factors together, not in isolationChapters 0:00 Why salt, fluids, and compression aren’t the full answer1:23 Triggers vs. what keeps POTS going3:46 The 2026 paper: POTS, ME/CFS, and Long COVID as neuroimmune disorders4:47 How POTS is actually diagnosed7:44 The vestibular system is more than your inner ear9:22 The vestibulosympathetic reflex vs. the baroreceptor reflex13:59 What likely breaks down in POTS16:21 How the inner ear regulates blood flow to the brain19:44 Blood flow drops before symptoms appear (and why we use fNIRS)21:42 What astronauts teach us about POTS24:12 What should be evaluated26:07 The skeletal muscle pump and the vestibular connection30:13 Brainstem inflammation and the self-perpetuating loop33:12 Levels of vestibular testing: VNG, positional, caloric, rotary chair37:27 Why generic vestibular rehab often makes people worse39:58 What a thorough treatment plan looks like44:08 The neck, upper cervical care, hypermobility, and CCI47:03 The visual system and “central” dysfunction48:23 What needs to change in the field51:31 Research citations and where to learn moreLearn more: Peak Brain and Body, near Tampa, FL, serves patients traveling from across the country and around the world. Visit peakbrainandbody.com.

Brain fog. Exhaustion. Dizziness. Food reactions. Symptoms that flare without an obvious reason. If you’re living with long COVID or mast cell activation syndrome (MCAS), you may have collected diagnoses and tried multiple treatments without understanding why you still feel so sick. In this episode of Brain Body Reset, Dr. Spencer Zimmerman sits down with long COVID researcher and immunology educator Dr. Novack PhD to explore what may be keeping that cycle going, and the research investigating ways to interrupt it. Dr. Novack shares findings from his clinical trial examining a no-added-sugar diet and fasting in people with long COVID. We discuss autophagy, your cells’ internal cleanup and recycling process, and why researchers are interested in its potential role in persistent symptoms. We also connect the dots between mast cells, inflammation, mitochondrial dysfunction, and the nervous system to help you better understand symptoms that are too often treated in isolation. You’ll hear about: Why mast cells do much more than release histamine, and why that matters when antihistamines only help so much.How mast cell activity and autonomic dysfunction may influence each other in MCAS and POTS.The possible role of persistent virus in long COVID, and the limitations of current testing.How damaged mitochondria may contribute to fatigue and post-exertional malaise.Mast cell stabilizers, including cromolyn and ketotifen, and emerging treatment research.Why nutrition, sleep, and individual treatment responses deserve a place in the conversation.If you’ve been told to manage each symptom separately, this conversation offers a more connected way to understand what may be happening and questions to bring to your healthcare team. This episode discusses emerging research and proposed mechanisms, not established cures. Fasting is not appropriate for everyone, and changes to fasting or medication should be discussed with your treating clinician.

Have you been diagnosed with hEDS and have a variety of neurological symptoms and findings? Maybe you struggle with: chronic fatigue, brain fog, headaches/migraines, dizziness, light/noise sensitivity and more. Your imaging suggest chiari malformation or cranio-cervical instability. A recent research article is proposing for a new subtype to hEDS, known as Neuro-EDS. This is meant to better capture what is happening. To learn more about our approach to EDS: https://peakbrainandbody.com/conditions/eds/

Most conversations about Ehlers-Danlos syndrome focus on joint hypermobility, ligament laxity, pain, and the musculoskeletal system. But is that enough to explain the brain fog, fatigue, dizziness, headaches, sensory overload, anxiety, and autonomic symptoms many people with EDS experience? In this episode, Dr. Spencer Zimmerman NP, DC, DACNB reviews a 2025 research paper exploring the neurological and neuropsychological side of Ehlers-Danlos syndrome. You’ll learn about: The 13 recognized EDS subtypes and why hypermobile EDS receives the most attentionBrain structural differences associated with EDSChiari malformation and craniocervical instabilitySmall fiber neuropathy and autonomic dysfunctionThe overlap between EDS, POTS, and reduced cerebral blood flowHow impaired proprioception may affect balance, coordination, joint stability, and injury riskThe roles of interoception, sensory processing, and neurological efficiencyWhy anxiety, panic disorders, depression, ADHD, and autism are discussed in EDS researchHow the amygdala, prefrontal cortex, insula, anterior cingulate cortex, cerebellum, and brainstem may contribute to symptomsWhy normal structural imaging does not necessarily rule out impaired neurological functionThe presence of a structural finding such as Chiari malformation or craniocervical instability does not automatically mean it explains every symptom. At the same time, treating EDS as purely a joint and connective-tissue condition may leave major pieces of the problem unaddressed. This episode explains why people with EDS may need an integrated approach that considers the musculoskeletal system, nervous system, autonomic regulation, mental health, blood flow, immune function, and the way the brain processes information from the body. Educational only and not personal medical advice. https://peakbrainandbody.com/conditions/eds/

POTS is not one condition with one cause and treating the elevated heart rate alone often fails to address why someone remains sick. In this episode, Dr. Spencer Zimmerman breaks down a major POTS review published in August 2026 and translates the findings into language patients and families can understand. He explains the different processes that may contribute to POTS, including small fiber and autonomic neuropathy, low blood volume, excessive sympathetic activation, and impaired blood flow and oxygen delivery to the brain. You’ll also learn why normal oxygen saturation and blood pressure readings do not necessarily mean the brain is receiving adequate blood flow, which conditions most commonly overlap with POTS, and why migraines and irritable bowel syndrome may deserve more attention than they currently receive. The episode also examines standard POTS treatments—including exercise, fluids, salt, compression garments, dietary changes, and medications—along with medications that may worsen symptoms. Finally, Dr. Zimmerman discusses what the current research may be missing, including vestibular and eye-movement dysfunction, cervical integration, overlooked lab findings, hormonal changes, and why neurological rehabilitation may need to come before traditional cardiovascular conditioning for some patients. To learn more: https://peakbrainandbody.com/conditions/pots-dysautonomia/

If you become dizzy, nauseous, weak, foggy, or feel like you might pass out when you stand, it is easy for everything to get labeled as POTS. But POTS is only one form of orthostatic intolerance. In this episode, Dr. Spencer Zimmerman breaks down the differences between POTS, orthostatic hypotension, and neurocardiogenic syncope. These conditions can cause very similar symptoms, but the changes in heart rate, blood pressure, and neurological regulation do not follow the same pattern. You’ll learn: What should normally happen to your circulation when you standHow POTS, orthostatic hypotension, and neurocardiogenic syncope are diagnosedWhy the timing of heart-rate and blood-pressure changes mattersWhich of these conditions can occur together—and which cannotWhy cardiac testing is still important, even when it comes back normalHow dehydration, anemia, medications, neurological conditions, and other factors can contributeWhy salt, fluids, compression, exercise, and medications help some people but not everyoneWhy receiving the correct diagnosis is only the beginning of understanding what you need to improveIf you have been diagnosed with dysautonomia but still do not understand why you are struggling or why the standard recommendations have only helped partially; this episode will help you see what may still be missing. This episode is for educational purposes only and is not medical advice. Speak with your healthcare provider before changing medications or treatment. To learn more: https://peakbrainandbody.com/conditions/pots-dysautonomia/

It is slightly too long for a podcast episode description. The content is good, but I’d tighten it so someone can understand the episode quickly without feeling like they have already consumed it. If your heart races every time you stand—but your cardiac testing keeps coming back normal—the heart may not be the real problem. POTS is diagnosed by changes in heart rate, but research suggests that the heart-rate increase may be a response to something happening earlier: an excessive drop in cerebral blood flow when you become upright. In this episode, Dr. Spencer Zimmerman explains why this matters, how the brain and autonomic nervous system normally regulate blood flow, and how impaired regulation may contribute to dizziness, brain fog, fatigue, shortness of breath, digestive problems, temperature intolerance, and other symptoms. You’ll also learn why salt, electrolytes, compression, and medications may help without fully explaining—or addressing—why you remain stuck. If you have POTS or dysautonomia and feel like no one has connected all your symptoms, this episode will help the bigger picture make more sense.

If you've been told there's nothing more to do for your long COVID, or that the research just isn't there yet, this episode pushes back on both claims.  Dr. Zimmerman NP, DC, DACNB breaks down one of the most comprehensive 2025 research papers on the neurological effects of long COVID, walking through what's actually driving symptoms like brain fog, fatigue, dizziness, mood changes, and post-exertional malaise.  He covers the imaging and lab findings showing real, measurable brain changes, the overlapping mechanisms long COVID shares with POTS, MCAS, EDS, ME/CFS, and post-concussion syndrome, and why treating these as separate, isolated diagnoses keeps people stuck.  You'll learn why a single test or single treatment was never going to be the answer, what a layered, multimodal approach actually looks like, and why most people aren't failing because they're "defective" — they're failing because the approach they were given wasn't built for the complexity of what's really going on. This is research translated into something you can actually use, and a roadmap for the conversation to have with any provider willing to dig in with you.

Dizziness is one of the most common symptoms people struggle with… and one of the most misunderstood. If you’ve been told everything looks “normal,” yet you still feel off, this episode explains why. Instead of chasing a single cause, we break down a more accurate framework — looking at how dizziness can come from metabolic issues, inflammation, the immune system, vascular changes, the neck, and ultimately how the brain processes it all.  You’ll learn:  Why “normal labs” don’t always mean normal function  Why treatments work for some people but not others  The overlooked role of the brain, vision, and vestibular system  And why there’s no one-size-fits-all fix If you’re tired of guessing and want to understand what’s actually driving your symptoms, this episode will give you a completely different lens to look through. https://peakbrainandbody.com

Are your migraines or headaches still running your life—despite normal scans, multiple medications, and endless “try this” advice? In this research-backed Q&A, Dr. Spencer Zimmerman breaks down why migraines and chronic headaches are far more complex than most people are told. Instead of focusing on labels, he walks through the four core arenas that must be evaluated to truly reduce frequency and intensity: Immune system & inflammation (CGRP, histamine, gut health, autoimmune links)Vascular factors & autonomic regulationMitochondrial energy and metabolic efficiencyBrain connectivity (cerebellum, vestibular system, trigeminal pathways)You’ll learn: Why normal MRIs don’t mean “nothing is wrong”How medications like CGRP inhibitors work—and why they don’t solve the root causeThe hidden role of magnesium, riboflavin, omega-3s, and ketonesWhy gut health and brain health are inseparableHow caffeine and common OTC medications can perpetuate rebound headachesWhy no one is looking at brain connectivity—and why that mattersIf you’ve been told to “just manage it,” this episode will challenge that narrative and give you a systems-based framework for understanding what’s actually driving your migraines. Because the goal isn’t to block pain.  The goal is to prevent it. If you’re ready to understand your headaches differently—and explore what’s actually possible—this episode is for you. https://peakbrainandbody.com/

Still dizzy, foggy, exhausted—or dealing with racing heart symptoms—despite “normal” tests?  In this Q&A episode, Dr. Zimmerman explains why concussions and POTS are often misunderstood, why MRI/CT scans are usually normal in concussion, and what most evaluations miss (objective balance + eye-movement testing). He also breaks down POTS as a nervous system/autonomic issue, why patients get bounced between cardiology and neurology, and how immune/metabolic factors like histamine patterns and low ferritin can worsen symptoms. https://peakbrainandbody.com/concussion-symptoms-and-treatment/

A concussion story most people never hear. Dr. Zimmerman and his wife, Sara, share the raw, real experience of navigating yet another concussion—from subtle early symptoms to the emotional toll it takes on daily life. When symptoms don’t make sense—but your body knows something is wrong. Fatigue, mood swings, dizziness, nausea, memory lapses, and loss of motivation all appeared quickly, even after what seemed like a minor hit. Why standard care often leaves people stuck. Learn how normal scans, generic treatments, and symptom-chasing can miss the true neurological drivers of post-concussion symptoms. What actually made the difference this time. From vestibular and eye movement findings to targeted neurological therapies, hear how a personalized approach helped symptoms improve faster than expected. A powerful reminder for anyone who’s been told “this is just how it is.” This episode challenges the belief that chronic concussion symptoms are permanent—and explains why the right care matters more than ever.

What if a little-known brain fat could play a major role in fatigue, brain fog, and neurodegeneration? Dr. Zimmerman introduces plasmalogens and why they’ve become a key focus in complex neurological cases.Plasmalogens quietly protect brain, nerve, and heart cells—until levels drop. Learn how aging, inflammation, and chronic conditions may accelerate their loss and what that means for symptoms and disease progression.Emerging research links low plasmalogens to conditions like Parkinson’s, Alzheimer’s, MS, and neuropathy. This episode explores what the science suggests—and why waiting years for “perfect data” isn’t an option for those suffering now.Why supplementation isn’t as simple as “take more.” Dr. Zimmerman breaks down absorption challenges, precursor strategies, and why dosing must be individualized.Plasmalogens aren’t a magic bullet—but when stacked with the right neurological and immune support, they may change the trajectory. Discover how they fit into a true brain-body, systems-based approach.This episode is a must-listen if you’ve tried “everything” and are still searching for answers that actually move the needle.

Myth #1: “It’s just anxiety.” Dr. Z breaks down why this misunderstanding leads to misdiagnosis, gaslighting, and years of unnecessary suffering. Why drinking more water and pounding salt isn’t a real solution—and what’s actually driving your dizziness, fatigue, and tachycardia. The shocking truth: Most POTS symptoms are neurological, not cardiovascular—and traditional testing completely misses it. Why medications help some symptoms but never fix the root problem (and why you crash as soon as you stop them). The biggest unlock: Your visual system, vestibular system, hormones, blood sugar, and immune health may be the hidden drivers your providers never checked.