Sliced Bread is the series that 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'? Science presenter Greg Foot finds out. Greg speaks to experts on a bunk-busting mission to test the latest consumer trends chosen by listeners. Do they live up to the hype? Or are they just marketing BS? Greg chats to the experts, dives into the data, performs tests and crunches the numbers before putting his findings back to the listener so they can decide if it's worth spending their hard earned money on. New episodes of Sliced Bread are released weekly on Thursdays wherever you get your podcasts. But if you're in the UK, you can listen to the latest episode on BBC Sounds first, a week earlier than anywhere else. If you have a suggestion for a product to investigate, you can email the team on sliced.bread@bbc.co.uk or send a WhatsApp voice note via the number 07543 306807. Sliced Bread is produced by BBC Audio North for BBC Radio 4 and BBC Sounds.
Can you really learn a new language from apps like Duolingo? Sliced Bread listener Nathan Phelps has been teaching himself Japanese. He’s tried textbooks, tutors, and crucially, language apps on his phone - and he came to us because he’s seen these apps claiming to be “backed by science” to help you “learn a new language, fast”. More recently he’s even seen apps boast about “AI powered features” to help you practice your language skills, available on premium subscriptions. Nathan wants to know: are language apps an effective way to learn? How do they compare to other ways of learning? And can AI really supercharge your language skills? To find out more, presenter Greg Foot is joined by Professor Elizabeth Wonnacott, Professor of Language Science at the University of Oxford and Director of the Language Learning Lab in their Department of Education. 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 sliced.bread@bbc.co.uk OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: JULIA RAVEY PRODUCERS: PHIL SANSOM AND GREG FOOT
Sliced Bread - Series 17: Kitchen Sponges, Cloths and Brushes
Which is the most hygienic for cleaning your kitchen? Most of us will be familiar with the cheap packs of coloured kitchen sponges with the abrasive tops, used for washing dishes and wiping surfaces. But could they be harbouring a host of bacterial baddies? Listener Caroline wants to know as she uses them regularly and even goes as far as running them through the washing machine to keep them cleaner for longer! Does that really work? And are there concerns about these sponges releasing microplastics? Would alternatives like cloths or brushes be a better option? To answer all of these questions, presenter Greg Foot is joined by Markus Egert, Professor of Microbiology and Hygiene at Furtwangen University in southwest Germany and one of the authors of a major study into the hygiene of sponges; and Vilde Snekkevik, research scientist at the Norwegian Institute for Water Research in Oslo. 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 sliced.bread@bbc.co.uk OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: JULIA RAVEY PRODUCERS: SIMON HOBAN AND GREG FOOT
Sliced Bread - Series 17: Robotic Lawnmowers
Can robotic lawnmowers save you time without hassling hedgehogs? Listener Pat has seen adverts for robotic lawnmowers and has lots of questions: Do they cut effectively? How do they manage with edges and flower borders? And what about avoiding wildlife and other objects in the garden? To find out, presenter Greg Foot is joined by BBC Gardeners' World magazine's tech reviewer Harry Duncton, alongside Dr Sophie Lund-Rasmussen (aka 'Dr Hedgehog'), who has carried out research into the dangers to hedgehogs posed by robotic lawnmowers. 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 sliced.bread@bbc.co.uk OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: JULIA RAVEY PRODUCERS: SIMON HOBAN AND GREG FOOT
Sliced Bread - Series 17: Gut Microbiome Tests
Can a test tell you what's living inside your gut - and what to do about it? That's what listener Pete Mace asked us, kicking off a brand new series of Sliced Bread! He's seen 'gut microbiome tests' advertised by ZOE, Randox Health and others. They promise to tell you about the bacteria - and other bugs - currently making your intestines their home. Many also claim they'll use this information to make personalised diet recommendations, showing you exactly what you should and shouldn't eat to nurture the right bugs and improve your health. Pete wants to know: what can these tests really tell you? And can they really provide a diet tailored precisely to your personal wellbeing? To find out more, presenter Greg Foot is joined by Dr Nick Ilott, Senior Researcher and lead Bioinformatician at the Oxford Centre for Microbiome Studies; and Dr Fred Warren, group leader at the Quadram Institute who researches how gut microbes interact with food. 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 sliced.bread@bbc.co.uk OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: JULIA RAVEY PRODUCERS: PHIL SANSOM AND GREG FOOT
Toast - Series 7: Orange
Orange was once one of the most recognisable brands in Britain — a mobile network with its iconic slogan “The future’s bright, the future’s Orange”, it helped turn mobile phones from elite business tools into everyday essentials. But while the Orange name still exists globally, its mobile service disappeared from the UK. So what happened? BBC Business journalist Sean Farrington investigates how Orange took the UK by storm in the 1990s telecoms boom — and why, at home, it ultimately gave way to a new brand: EE. Joined by resident business expert and entrepreneur Sam White, Sean explores the bold brand thinking that set Orange apart, the rapid growth that made it a takeover target, and the strategic turning points that reshaped the company. Along the way, they hear from the people who built the brand, including founding marketer Chris Moss, former executives Linda Kennedy and Stuart Jackson, and former EE CEO Olaf Swantee, to understand how Orange captured the public imagination — and why it couldn’t remain a standalone mobile network in the UK. At the end, Sam draws her own conclusions: as the future stayed bright but less Orange, was the brand overtaken by change — or did it choose to evolve into something new? If you have an idea for an interesting Toast topic, email toast@bbc.co.uk . This episode was produced by Linda Walker. Toast is a BBC Audio North production for BBC Radio 4 and BBC Sounds.
Toast - Series 7: Izal Medicated Toilet Paper
Izal medicated toilet paper was once a staple of British bathrooms - a curious cultural icon, remembered as much for its distinctive feel as for its antiseptic promise. Produced for decades by the Sheffield‑based company Newton, Chambers & Co., Izal became woven into the fabric of schools, hospitals and public buildings across the UK. So how did a product that was everywhere for so long, end up disappearing from shelves, surviving only in nostalgia, and uncomfortable memories? BBC Business journalist Sean Farrington investigates how Izal medicated toilet paper went from national widespread use to historical footnote, joined by resident business expert and entrepreneur Sam White. To uncover the story, Sean and Sam dig into industrial archives, public‑health records and the memories of those who grew up with the unmistakable crinkle of Izal. They hear from former Newton Chambers employees, alongside Dr Alice White - Digital Editor at English Heritage and Historian of Psychology and former Jeyes employees, Nicholas Goodwin and Jayne Howe- who followed the Izal brand closely after it changed hands in the 1980s. At the end, Sam must draw her own conclusions about the fate of Izal medicated toilet paper - from changing hygiene standards to the rise of softer, more luxurious competitors - and decide whether its decline was inevitable or simply a failure to adapt? If you have a good idea for an interesting Toast topic then tell us about it - email toast@bbc.co.uk This episode was produced by Linda Walker. Toast is a BBC Audio North production for BBC Radio 4 and BBC Sounds
Toast - Series 7: Paperchase
Why did the popular stationery chain, Paperchase, end up closing all of its shops? The BBC Business journalist, Sean Farrington, investigates in the company of resident entrepreneur, Sam White. Paperchase was founded by two former art students in the late 1960s and went on to become the design darling of the high street, known for its charming greeting cards, wrapping paper, stationery, gifts and art materials. It expanded across Britain and beyond to America, the Middle East and parts of Europe. What made Paperchase so special? And how could decades of success slide into decline then shop closures? Sean speaks to: -Chris and Rebecca Pond whose father, Eddie Pond, was Paperchase's co-founder -Timothy Melgund - who ran Paperchase under different ownership for over 20 years and led two management buyouts. -Liz Faulkner - from Jelly Armchair, a company that designs greeting cards and supplied Paperchase. At the end, Sam White has to come up with her own conclusions about the fate of Paperchase based on what she has just heard. If you have a good idea for an interesting Toast topic then tell us about it - email toast@bbc.co.uk Produced by Jon Douglas, Toast is a BBC Audio North production for BBC Radio 4 and BBC Sounds.
Toast - Series 7: EasyCinema
The EasyJet founder, Sir Stelios Haji-Iannou, tried to shake up the cinema industry by introducing low-cost movie theatres. Tickets were priced as low as 20p for customers who booked in advance. So, why didn't EasyCinema take off? Stelios speaks to the BBC Business journalist, Sean Farrington, reflecting on his attempts in the early 2000s to bring to UK cinemas the same dynamic pricing that had revolutionized the aviation sector. Sean also hears from Mark Batey (who was chief executive of the Film Distributors' Association when EasyCinema opened) and speaks to Stewart Niblock (who was Easy Group's Head of New Projects so was responsible for refurbishing and opening the cinema) and Angela Chan (who is now Professor of Creative Industries at Royal Holloway, University of London but in 2003 she was a BBC producer/director who was filming a TV documentary about EasyCinema). At the end, the resident business expert and entrepreneur, Sam White, has to come up with her own conclusions about the fate of EasyCinema based on what she has just heard. If you have a good idea for an interesting Toast topic then tell us about it - email toast@bbc.co.uk Produced by Jon Douglas, Toast is a BBC Audio North production for BBC Radio 4 and BBC Sounds.
Toast - Series 7: Wilko
Wilkinson - or Wilko as it became known - was a privately-owned family business that had been successful for decades, offering low-priced household products from its chain of high street stores. So why did it falter during a cost-of-living crisis when people were looking for value? The BBC Business journalist, Sean Farrington, investigates how its stores ended up toast, in the company of resident business expert and entrepreneur, Sam White. To help explain what happened, Sean and Sam delve into the parliamentary archives and hear from expert guests including Gordon Brown who was Wilkinson's managing director for 15 years and Patrick O'Brien, Research Director at GlobalData who has followed the fortunes of high street names for over a decade. At the end, Sam has to come up with her own conclusions about the fate of Wilko based on what she has just heard. If you have a good idea for an interesting Toast topic then tell us about it - email toast@bbc.co.uk Produced by Jon Douglas, Toast is a BBC Audio North production for BBC Radio 4 and BBC Sounds.
Sliced Bread - Series 16: Food Containers
Is it ok to store food in plastic containers? That's the question put by listener Joe Tattersall in this, the last episode in the current series of 'Sliced Bread'. Joe's noticed scuffs and abrasions on his reusable plastic containers and is concerned about whether that increases the risk of 'chemical leaching' into his food, or ingesting microplastics. He's keen to know if alternatives like glass, silicon, or metal containers could better for our health, as well as for the planet. And what about putting them in the microwave to heat food, using them to freeze food after batch-cooking, or putting them in the dishwasher to clean? To find out more, presenter Greg Foot is joined by Dr Stephanie Wright, Senior Lecturer in Environmental Toxicology at Imperial College London; and Jane Muncke, Managing Director and Chief Scientific Officer at the Food Packaging Forum. We're taking a break to prepare another batch of Sliced Bread but we're as hungry as ever for your suggestions of wonder products to investigate. Please do send your ideas to us either on email to sliced.bread@bbc.co.uk or to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: SIMON HOBAN AND GREG FOOT
Sliced Bread - Series 16: Cat Litter
What kind of cat litter is best for cats, owners and the environment? After we looked at dog poo bags for an episode, it's only right that we answer some questions for the cat lovers, around cat litter. Listener Ella got in touch to ask about it, after adopting her Sphynx indoor cat, Mr. Big (short for Mr. Bigglesworth). She wanted to know: what is the most absorbent cat litter that doesn't smell, doesn't cause problems for her floors when kicked out of the litter tray and might be better for the environment? Greg Foot is joined by veterinary surgeon and author of the book What's My Cat Thinking? Dr. Jo Lewis – as well as engineer and former managing director of pet care company Bob Martin, Savi Madden – to get the inside scoop. 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 sliced.bread@bbc.co.uk or send a voice note to our WhatsApp number, 07543 306807. Researcher: Phil Sansom Producers: Kate Holdsworth and Greg Foot
Sliced Bread - Series 16: Ergonomic Keyboards and Mice
Do ergonomic devices like split keyboards and vertical mice help with comfort and health? If you're a heavy computer user there are an increasing variety of weird and wonderful options to help improve your comfort and reduce the risk of aches and pains associated with 'Repetitive Strain Injury' (RSI). Listener Tim is curious whether ergonomic tools—such as split keyboards, alternative layouts, or vertical mice—could optimise his professional setup as a software engineer. To find out, presenter Greg Foot does a deep-dive into the evidence alongside Nichola Adams, from the Chartered Institute of Ergonomics and Human Factors; and Ben Vallack, who runs a YouTube channel all about workflow and design. And if you're interested in this topic, we have a companion episode on Standing Desks - available along with all our other episodes on BBC Sounds. 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 sliced.bread@bbc.co.uk OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: SIMON HOBAN AND GREG FOOT
Sliced Bread - Series 16: Vibration Plates
Can Vibration Plates help with fitness, bone density, and even lymphatic drainage? They've been around for a while but vibration plates seem to be having another 'moment'. Originally touted as a piece of fitness kit for the gym or home, the latest ads on social media seem to be promoting claims around benefits to bone density and lymphatic drainage. Listeners Natasha and Steve got in touch wanting to know whether all this could really be true of a single wonder product! To find out, presenter Greg Foot is joined by Dr Claire Minshull, a sports rehabilitation expert, and Professor Neil Mansfield, author of the book 'Human Response to Vibration'. 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 sliced.bread@bbc.co.uk OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: SIMON HOBAN AND GREG FOOT
Sliced Bread - Series 16: Hair Removal Devices
Can Intense Pulsed Light devices really "zap" away your unwanted hair? You may have seen IPL devices advertised on social media - that promise painless hair removal using light to "zap" away body hair. Listener Karen got in touch to ask if these "Zappers" could possibly free her from having to shave her legs in the summer? How are they supposed to work, are they safe to use, and is it worth the investing in one? To find out, Greg Foot is joined by Dr Gill Westgate, a skin and hair biologist and honorary visiting lecturer at the University of Bradford. 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 sliced.bread@bbc.co.uk OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: KATE HOLDSWORTH AND GREG FOOT
Sliced Bread - Series 16: Infrared Saunas
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 sliced.bread@bbc.co.uk OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCERS: SIMON HOBAN AND GREG FOOT
Sliced Bread - Series 16: Earwax Removers
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 sliced.bread@bbc.co.uk OR send a voice note to our WhatsApp number, 07543 306807. RESEARCHER: PHIL SANSOM PRODUCER: KATE HOLDSWORTH & GREG FOOT
Sliced Bread - Series 16: Collagen (2026 Update)
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 sliced.bread@bbc.co.uk or send a voice note to our WhatsApp number, 07543 306807. Researcher: Phil Sansom Producers: Phil Sansom and Greg Foot
Dough - Series 4: Food
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
Dough - Series 4: Eyewear
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
Dough - Series 4: The Office
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.
