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Are infrared saunas as effective as traditional ones? If you've ever sat sweating on a wooden bench in a traditional ('Finnish') sauna wondering if there was an easier way, could infrared be the answer? Infrared saunas work at lower temperatures, ostensibly making it easier to stay in there for longer. Listener Paul got in touch after trying one and wants to know if infrared saunas give you the same purported benefits as traditional ones. Those claims include: improved cardiovascular health, weight loss, longevity and even benefits to mental health and depression. But what's the evidence and does it amount to a load of hot air? To get the answers, Greg Foot is joined by Professor Chris Minson, an expert in the effects of heat on the body who's carried out research on infrared saunas. All of our episodes start with YOUR suggestions. If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at [email protected] OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: SIMON HOBAN AND GREG FOOT

Almost everyone is guilty of fiddling with their ears, especially if they can feel a build-up of earwax in there. But what actually works to get rid of it, and should we be messing with them in the first place? Listener Martin got in touch after finding out his earwax build-up was returning - and wanted to know if drops alone would solve his problem, or if he needed to seek professional help to remove it? Greg Foot speaks to professor of Audiology at Manchester University, NIHR senior Investigator and former chairman of the British Society of Audiology, Kevin Munro - to find out.  All of our episodes start with YOUR suggestions. If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at [email protected] OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCER: KATE HOLDSWORTH & GREG FOOT

What's the latest on Collagen? The new series of Sliced Bread kicks off with an update on one of the wonder products most-requested by listeners. Presenter Greg Foot first looked at Collagen in 2022 and returns to the subject to find out what has changed in the scientific landscape since then. Could there be new evidence that it really can do what the manufacturers claim: rejuvenate skin, nails and hair - and even help with joint and bone health? To find out, Greg is rejoined by the expert from that original episode four years ago, dermatologist Dr Emma Wedgeworth, alongside Professor Jayne Tierney from University College London who specialises in reviewing evidence. Together they do a deep-dive on the latest science, including a new study from one of the brands featured in 2022, Absolute Collagen. Does it stand up to scrutiny? If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at [email protected] or send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: PHIL SANSOM AND GREG FOOT

What will the food of the future look like? Greg Foot finds out. Greg Foot, host of BBC Radio 4’s Sliced Bread, returns with Dough — the series exploring the rise of future wonder products that could transform the way we live. Each episode examines the emerging technologies and innovations poised to shape tomorrow’s world. Greg speaks with experts and entrepreneurs to uncover the trends influencing how today’s everyday essentials might evolve, before a leading futurist offers their predictions for life five, ten and fifty years from now. This episode explores how our food choices could change as the climate becomes hotter and more volatile. Are we heading towards a menu built around ancient grains, 3D‑printed dishes and AI‑tailored nutrition plans? And where does lab‑grown meat sit — both in terms of public appetite and the rules needed to get it on our plates? Alongside Greg, tucking in to a taste of the future, is futurist Tom Cheesewright, joined by expert guests including: - Karina Zimerfeld, the Global Vice President of Research & Development at Mars Food & Nutrition - Charles Banks, Partner & Managing Director of global trends agency The Food People - Owen Ensor, Chief Executive of Meatly This episode was produced by Linda Walker Dough is a BBC Audio North Production for BBC Radio 4 and BBC Sounds

Could smart glasses with built-in video cameras become widely accepted? Greg Foot, host of BBC Radio 4's 'Sliced Bread' brings you 'Dough', examining the rise of future wonder products. Greg is joined by experts, entrepreneurs and industry innovators to discuss the trends we're seeing today and where they may lead us tomorrow, before a leading futurist offers their predictions on what life might be like within five, ten and fifty years. This time we’re looking at the future of eyewear - asking whether smart glasses with built-in video cameras might see past previous failures to become widely accepted? And whether you might soon be wearing smart contact lenses that can not only display websites and messages, but also potentially monitor your eye health? Greg is joined by the futurist Tracey Follows and guests including: - Priya Morjaria, Assistant Professor in International Eye Health at the London School of Hygiene and Tropical Medicine and Head of Global Programme Development at Peek Vision - Alex Himel, Vice President of Wearables at Meta which is selling smart glasses with embedded artificial intelligence, cameras, microphones and speakers. - Professor Philip Morgan, Head of Optometry at the University of Manchester Produced by Jon Douglas. Dough is a BBC Audio North Production for BBC Radio 4 and BBC Sounds

What will the office be like in future? Greg Foot, host of BBC Radio 4's 'Sliced Bread' brings you 'Dough', examining the rise of future wonder products. Greg is joined by experts, entrepreneurs and industry innovators to discuss the trends we're seeing today and where they may lead us tomorrow, before a leading futurist offers their predictions on what life might be like within five, ten and fifty years. This time we’re looking at the future of the office - asking whether in years to come, we’ll even need one? If so, is the ‘conference room’ soon to be a thing of the past, replaced with cafes, comfy chairs, and table tennis tables? And will our future HQs be home to service robots and AI receptionists? Greg learns how the Covid-19 pandemic changed office working and the trends transforming the look of high-end office developments. He is joined by the futurist Tom Cheesewright and guests including: - Professor Matt Davis, University of Leeds - Jane Clay, Strategy Leader and Principal at Gensler which designs and refurbishes buildings around the world - Mike Dalloz, Chief Executive Officer and Co-founder of The Meeting Pod Company. Produced by Jon Douglas. Dough is a BBC Audio North Production for BBC Radio 4 and BBC Sounds.

Could ticketless travel and satellite connectivity be coming to our rail network? Greg Foot examines the rise of future wonder products. He's joined by experts, entrepreneurs and industry innovators to discuss the trends we're seeing today and where they may lead us tomorrow, before a leading futurist offers their predictions on what life might be like within five, ten and fifty years. In this episode Greg hears how renationalisation, digital signalling, satellite connections, ticketless technology and battery power might transform our trains in the future. With him is the futurist Tom Cheesewright and guests including: - Dickon Ross, Editor of Rail Magazine - Maggie Simpson OBE, Director General at the Rail Freight Group - Mike Butler, Director of Rail & Innovation at Clarus Networks Produced by Jon Douglas. Dough is a BBC Audio North Production for BBC Radio 4 and BBC Sounds.

What will mobile phones be like in future? Greg Foot investigates Greg Foot, host of the BBC Radio 4 show 'Sliced Bread', brings you 'Dough'. Each episode explores future wonder products that might rise to success and redefine our lives. Experts and entrepreneurs discuss the trends shaping what today's everyday technology may look like tomorrow, before a leading futurist offers their predictions on what life might be like within five, ten and fifty years. This time we’re looking at the future of mobile phones - asking whether our handsets will shrink, stretch, roll, fold… or even disappear as new technology takes over? And will super-smart devices with AI assistants that second-guess our every move become the new normal? Alongside Greg is the futurist, Tracey Follows, and expert guests: leading strategist in the tech industry, Chetan Sharma, innovator and creator from one of the world’s newest Mobile Phone manufacturers, “Nothing Mobile", their AI and design lead, Sélim Benayat and co-founder and CEO of Honest Mobile, Andy Aitken. This episode was produced by Linda Walker Dough is a BBC Audio North Production for BBC Radio 4 and BBC Sounds

Sleep deprived parents everywhere are tempted to reach for anything that might help them get a little more sleep overnight – but can products promising to encourage babies to snooze for longer – really do that? And is there any science to back it up? That is exactly what tired Dad-of-three Dave wanted to know – and whether there were any future implications from using these gadgets, docks, blinds and sleep bags? New Dad Greg Foot speaks to Director of the Durham Infancy and Sleep Centre Professor Helen Ball, to find out. You can also read the official Safer Sleep guidance, by copy and pasting the links below into your browser: NHS - https://www.nhs.uk/best-start-in-life/baby/baby-basics/newborn-and-baby-sleeping-advice-for-parents/safe-sleep-advice-for-babies/ Lullaby Trust - https://www.lullabytrust.org.uk/baby-safety/safer-sleep-information/safer-sleep-overview/ RESEARCHER: PHIL SANSOM PRODUCER: KATE HOLDSWORTH & GREG FOOT

Which knife is best for the kitchen and how do you keep it sharp? After buying various knives over the years that ended up blunt, listener Susan is looking for one that will last. She's seen an array of different types and materials: Damascus steel, Japanese Gyuto knives, as well as alloys and additions that promise a sharper edge. They vary hugely in price - anything from £50 to £1,000. And if you do invest, how do you keep a knife sharp? To cut through the marketing BS, presenter Greg Foot is joined in the studio by Mark Miodownik, Professor of Materials & Society at University College London, and Rob Haslam aka Mr Knife Guy. All of our episodes start with YOUR suggestions. If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at [email protected] OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: SIMON HOBAN AND GREG FOOT

Do you really need a VPN? Listener Andrew has seen and heard lots of adverts for Virtual Private Networks (VPNs) and wants to know if they'll beef up the security on his computer. Will they provide extra protection from malware or hackers? To get the answers, presenter Greg Foot is joined in the studio by Professor Victoria Baines, fellow of the Chartered Institute for IT. All our investigations start with YOUR suggestions. If you have seen a wonder product promising to make you happier, healthier or greener, please do email us at [email protected] or send a voicenote to our Whatsapp number - 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: SIMON HOBAN AND GREG FOOT

Listener Amanda was Kefir curious, and got in touch with Sliced Bread to ask if the Kefir she was consuming for breakfast every day – was really having an impact on her health, cognitive function, and her gut? She wasn’t the only person to get in touch about kefir either, with others saying they keep seeing the benefits of fermented foods crowed about on social media. Greg Foot talks to head of the Food Biosciences department at the Irish National Research Body Teagasc, to get to the bottom of it. Each episode Greg investigates the latest ad-hyped products and trending fads promising to make us healthier, happier and greener. Are they really 'the best thing since sliced bread' and should you spend your money on them? If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at [email protected] or send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: KATE HOLDSWORTH & GREG FOOT

Can taking testosterone help with low libido and energy? It's all over social media and is often touted by celebs - both male and female - but is testosterone replacement therapy the answer to listener Clive's low energy levels? Clive got in touch after sending off for a blood test with an online health firm which showed he might have low testosterone and could be a candidate for therapy. But to buy it privately isn't cheap and once started, is a lifelong commitment. So is it worth the money? Presenter Greg Foot is joined by President of the British Society of Sexual Medicine, Mike Kirby, as well as NHS GP and Director of Men's Health at Manual, Dr Jeff Foster. If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at [email protected] or send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: SIMON HOBAN AND GREG FOOT

Listener Jenny, who enjoys a 90% cocoa bar from time to time, got in touch to ask if some of the reports that dark chocolate can have a positive effect on things like circulation and mood - have any truth behind them?  But Jenny also told Sliced Bread that since she read reports that heavy metals such as lead and cadmium could be in dark chocolate - she's been unable to enjoy her regular bar, until she knows it's safe to eat! Each episode Greg investigates the latest ad-hyped products and trending fads promising to make us healthier, happier and greener. Are they really 'the best thing since sliced bread' and should you spend your money on them? If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at [email protected] or send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM  PRODUCERS: KATE HOLDSWORTH & GREG FOOT

Is it ok to stay on weight loss injections? They have been nothing short of a pharmaceutical phenomenon. But for people like listener Lynn who've had huge success on weight loss drugs like Mounjaro, the question now arises about the implications of using them long-term. Could there be a 'maintenance' dose that would potentially allow for use over many years, or even a lifetime? And as scientists study the data, are other benefits emerging that go beyond just losing weight that could burnish their wonder-product reputation? Presenter Greg Foot is joined in the studio by Lynn to hear her story and do a deep-dive into the science alongside Professor of Molecular Neuroendocrinology at the University of Cambridge, Giles Yeo. At Sliced Bread we're hungry for your suggestions so we can keep making fresh batches! If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at [email protected] OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: SIMON HOBAN AND GREG FOOT