
Health & Fitness
Sliced Bread
BBC Radio 4
While Sliced Bread takes a break we serve up Toast. A study of the spectacular failures of brands which had promised so much to consumers. In each episode, the presenter and BBC business journalist Sean Farrington examines one big idea. What did it promise? Why did people back it? Why did they get burnt? Some of the world’s most successful businesses have also brought us some of the world’s most remarkable failures. So, what led them to be toast? And what can we learn from their stories today? Sean unpicks all the early optimism, hype and ambition. He learns about the tremendous success of a brand before hearing how it faltered, with help from expert commentators and people who were directly involved. How do they view things now and what, if anything, could have been done differently? The self-made millionaire and serial entrepreneur, Sam White, is alongside him, analysing the missteps that changed a brand’s fortunes and reaching her own, often instructive, conclusions. From big tech to high street retail and, of course, food, Toast tackles the business ideas that, one way or another, ended up cooked. Sliced Bread returns for a new batch of investigations in July, 2026. In the new series, Greg Foot will investigate more of the latest so-called wonder products to find out whether they really are the best thing since sliced bread. In the meantime, Toast is available in the Sliced Bread feed on BBC Sounds. Episodes will be released weekly on Thursdays wherever you get your BBC podcasts. But you can listen to the latest episodes, seven days earlier than anywhere else, first on BBC Sounds.Toast is a BBC Audio North production for BBC Radio 4.
Episodes to Learn English227

Painkillers
Feb 9, 202326 min<p>When it comes to shop-bought painkillers, there are rows and rows of shelves dedicated to them in supermarkets and pharmacies – ranging from own-brand tablets, to more expensive capsules and caplets, as well as branded packets that promise to work faster, and target specific pain. </p><p>Listener Hannah got in touch all the way from Tunisia to ask the questions – what’s the difference between paracetamol, ibuprofen or aspirin? Can certain painkillers target specific pain? And are any of them able to deliver faster pain relief than others – particularly the pricier branded ones? </p><p>Greg Foot swallows all the information available, and talks to experts in clinical pharmacology and biochemistry to find out. </p><p>This series, we’re testing and investigating your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807.</p><p>PRESENTER: Greg Foot PRODUCER: Kate Holdsworth</p>

Eco Laundry Products
Feb 2, 202328 min<p>In this episode presenter Greg Foot investigates three products that promise to make washing your laundry better for the planet.</p><p>Listener Clare wants to know if the Ecoegg she’s using really is a greener alternative to liquid detergent and whether the cleaning pellets inside are harmful to the environment.</p><p>Another listener, Jane, got in touch about laundry sheets – strips of concentrated detergent that go inside the washing machine’s drum. Is the slightly higher cost worth it to cut down on waste?</p><p>And finally Mary wanted to know about filters that capture harmful microfibres which are shed from our clothes in the washing process and get into the environment, causing huge problems for marine life.</p><p>This series, we’re testing and investigating your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807.</p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Petrol
Jan 26, 202327 min<p>Petrol is something millions of drivers around the UK rely on, but when faced with the choice of what to fill up with at the pumps, many wonder what is the difference between regular and premium unleaded?</p><p>That’s exactly what listener Irfan wanted to know, and if premium can really deliver on its promises to make your car more efficient, take you further, and clean out your engine for a higher price tag. </p><p>Greg Foot drives the investigation into unleaded petrol, what’s changed since we moved from E5 to E10 as our standard, what makes premium special, can it take you further, and whether our carbon footprint is better with one than the other?</p><p>PRESENTER: Greg Foot PRODUCER: Kate Holdsworth</p>

Energy Drinks
Jan 19, 202327 min<p>Sales of energy drinks are rising and their brightly coloured cans line the shelves of almost every supermarket or grocery store in the UK. But do brands like Monster, Red Bull and Relentless deliver on their promises? </p><p>Listener Syed is a consultant radiologist and says he needs to be on his A-Game in his demanding job. He wants to know if an energy drink would be any better than his usual cup of coffee in helping him stay alert. He's also keen to know more about some of the ingredients they contain - things like taurine, guarana and electrolytes. What exactly do they do? And are energy drinks safe to drink regularly?</p><p>Presenter Greg Foot has a thirst for knowledge and speaks to expert dieticians and cardiologists to find out if energy drinks live up to the hype. Are they the best thing since sliced bread - or marketing BS?</p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Shampoo
Jan 12, 202326 min<p>Shampoo ranges hugely in price, from own brand bottles to premium products that promise to improve your hair, leaving it in better condition, stronger and shinier. But can they really deliver?</p><p>Listener Sophie sent in a WhatsApp to ask just that, as well as whether we should use different shampoos depending on our hair type, if sulphates or parabens could be harmful to our hair, and if shampoo bars can do the job just as well, and be a greener option? </p><p>Greg Foot untangles some of the most common claims by speaking with a clinical Trichologist (someone who has studied the structure, function and diseases of human hair) as well as an expert chemist and pharmaceutical analyst. </p><p>This series, we’re testing and investigating your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807.</p><p>PRESENTER: Greg Foot PRODUCER: Kate Holdsworth</p>

Cold Defence Nasal Sprays
Jan 5, 202323 min<p>Two products dominate the market for nasal sprays that claim to reduce symptons of a cold - Vicks ‘First Defence’ and Boots ‘Dual Defence’. But do they work?</p><p>Listener Leah got in touch because she catches lots of colds from her young son and wants to know if they can help her get over them more quickly. She also wants to know if they’re safe to use regularly and how long you should take them for.</p><p>Presenter Greg Foot sniffs out the evidence and talks to a leading expert who’s dedicated most of his career to investigating cold remedies. </p><p>This series, we’re testing and investigating your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807.</p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Batteries
Dec 15, 202227 min<p>In the run up to Christmas, many parents will be checking on their battery supplies ahead of Santa bringing gifts that require them. But do branded batteries, that promise more power and longer life at a higher price point, really deliver it?</p><p>Listener Peter got in touch asking just that, as well as whether batteries have an expiry date? </p><p>Greg Foot recruits some year 7 pupils and their teacher to help him perform a test to find out, and speaks to one of the country’s leading scientists about what gives a battery more power, or helps it store more energy. </p><p>You can also hear more about the difference between single use, and rechargeable batteries in our longer podcast episode on BBC Sounds. </p><p>This series, we’re testing and investigating your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807.</p><p>PRESENTER: Greg Foot PRODUCER: Kate Holdsworth</p>

Perfume
Dec 8, 202229 min<p>Smelling good can come with a hefty price tag with the price of perfumes often getting into the hundreds of pounds. But what if there was a cheaper alternative?</p><p>Listener Callum got in touch because his bottle of expensive perfume is about to run out. Presenter Greg Foot turns his nose to the task, testing so-called 'clone' perfumes which claim to get as close the originals as to be indistinguishable - but for a fraction of the cost. Speaking to an expert perfumer he finds out exactly how the clone houses copy the ingredients of designer perfumes and whether they last as long.</p><p>Do they pass the sniff test? Are they the best thing since sliced bread or just marketing BS?</p><p>This series, we’re testing and investigating your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807.</p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Razors
Dec 1, 202229 min<p>It’s something most of us will have used at some point, and a product that has been around for decades in various forms. But do all the advertised fancy features, pivoting heads, multiple blades and higher price tags, really make a difference to your shave?</p><p>Listener Tim got in touch, asking just that, as well as whether all the extras on razors these days also have an impact on the environment?</p><p>Greg Foot focuses on modern cartridge razors in this episode, and cuts through the marketing hype to get answers, by speaking to a leading Dermatologist, as well as one of the top scientists at one of the largest razor manufacturers, Gillette.</p><p>This series, we’re testing and investigating your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807.</p><p>PRESENTER: Greg Foot PRODUCER: Kate Holdsworth</p>

Collagen Supplements
Nov 24, 202229 min<p>It’s one of the most talked-about cosmetic products but what’s the evidence that collagen supplements really do slow the visible signs of the ageing process? </p><p>Listener Jo got in touch wanting to know if the collagen supplement she’s spending £53 per month on will live up to its claim of reducing wrinkles, while promoting “glossy hair and plump dewy skin.”</p><p>Other listeners asked whether it can help with joint aches and pains, or strengthen nails?</p><p>Greg Foot sets out to answer all these questions by speaking to a leading consultant dermatologist as well as the co-founders of two of the biggest companies selling collagen supplements, Absolute Collagen and Ingenious Beauty. </p><p>This series, we’re testing and investigating your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807.</p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Wake Up Lights & SAD Lamps
Nov 17, 202233 min<p>With shorter days, longer nights, and bad weather leading to the winter blues for many, and for some the more severe Seasonal Affective Disorder, Sliced Bread investigates whether specially designed lights can really help improve how we feel.</p><p>Listener Ross got in touch on WhatsApp after he’d read claims Wake Up Lights and SAD Lamps can boost our mood, and wanted to know what “medically certified” means when accredited to them, and if it’s worth paying extra for it? </p><p>Greg Foot finds out by speaking to a leading expert in light therapy, as well as by visiting a manufacturer of these lights, to ask them to explain their claims, and whether they’re medically recognised in the UK. </p><p>This series, we’re testing and investigating your suggested wonder products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807.</p><p>PRESENTER: Greg Foot PRODUCER: Kate Holdsworth</p>

Portable Heaters
Nov 10, 202229 min<p>It's getting colder and with the cost of living rising, how best to heat our homes in the most efficient way possible has become a big question.</p><p>Listener Ken got in touch about a new kind of portable ceramic heater he's seen advertised, promising to heat your room using 30% less energy.</p><p>Greg Foot teams up with Octopus Energy to run it through the evidence mill and test it against three other types of portable heater: a convection heater, a fan heater and an oil-filled radiator to find out which gives the most heat for the lowest energy used. The aim is to find out which portable heater is best for heating you, and the room you're in. And how does all that compare to using gas central heating?</p><p>This series, we’re testing and investigating your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807.</p><p>PRESENTER: GREG FOOT PRODUCER: SIMON HOBAN</p>

Natural Deodorants
Nov 3, 202227 min<p>The Natural Deodorant market has recently expanded, with plenty of products out there promising to keep you fresh, and dry, without the use of traditional ingredients such as aluminium salts. </p><p>Listener PC Hollie got in touch on WhatsApp after she’d seen claims that regular deodorants and antiperspirants containing aluminium salts might be bad for our health, and wanted to know if natural deodorants are really better for us?</p><p>She also wanted to know why they’re more expensive, if it’s worth paying more, and if they can do the same job and keep her dry while she’s fighting crime. </p><p>Greg Foot finds out by speaking with a dermatologist Dr. Adil Sheraz, a chemist specialising in the makeup of natural products, Dr. Barbara Olioso, and by performing a “sweat test” where he convinced fellow gym goers to sniff his pits, and assess his sweat patches.</p><p>This series, we’re testing and investigating your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807.</p><p>PRESENTER: Greg Foot PRODUCER: Kate Holdsworth</p>

Compression Leggings, Bath Salts, Water Softeners and Filters
Aug 18, 202228 min<p>Can compression leggings improve performance and help your limbs recover after exercise? Do magnesium bath salts really help soothe aching muscles? And do water softeners and filters really help save us money on our appliances by preventing scale from building up in our pipes?</p><p>With Greg still in Edinburgh for the Festival, we’re sticking with last week’s format and investigating THREE of the wonder-products you’ve sent us on WhatsApp in a "triple slice" of quick investigations.</p><p>First up, Listener Sarah from North Devon wants to know if buying expensive compression leggings can really help improve her exercise performance and speed up her recovery. Greg speaks to one of the UK’s leading researchers on compression garments, Dr. Jess Hill, to find out the science behind them – and when we should wear them. </p><p>Second is listener Rosie from Sheffield who wants to know if magnesium or 'Epsom' bath salts really can help soothe aching muscles – so Greg chats to leading expert on magnesium, Dr. Lindsy Kass from the University of Hertfordshire to find out what it does in our bodies, and if we can actually absorb it through our skin. </p><p>And third, Listener Matthew from Suffolk wants to know if Water Softeners and filters can improve water quality, if they’re necessary, and if they can save us money on our household appliances by preventing the build up of scale. Greg chats to internationally recognised expert in drinking water Vanessa Speight - to find out.</p><p>Keep your suggestions coming for wonder-products you’d like us to investigate. Send them over on email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or as a voice note to our WhatsApp number: 07543 306807. </p><p>PRESENTER: Greg Foot </p><p>PRODUCER: Kate Holdsworth</p>

Dog Food, Diet Fizzy Drinks & Mouthwash
Aug 11, 202226 min<p>Is expensive dog food better for your pooch than the cheap stuff? Are diet fizzy drinks actually ‘bad’ for you? And should we all add mouthwash to our bathroom routine?</p><p>With Greg up at the Edinburgh Fringe Festival this week we’re doing something a little different - investigating THREE of the wonder-products you’ve sent us on WhatsApp in a triple slice of quick investigations.</p><p>First up, listener Ali in Bristol wants to know whether the expensive dog food she bought is really better for her new pooch than the cheaper stuff. Greg speaks to one of the UK’s most senior vets to find out the differences between wet and dry dog food and whether the latest doggy diet trends of vegan and raw food diets are a good idea for our canine companions.</p><p>Second is Sophie who loves Diet Coke but her friends and family say it’s bad for her. Greg finds out about the latest evidence from the Chief Scientific Adviser to the UK regulator, the Food Standards Agency.</p><p>Finally, listener Helen wants to know - what’s the point of mouthwash? And in finding out, Greg’s bathroom routine is turned on its head!</p><p>Keep your suggestions coming for wonder-products you’d like us to investigate. Send them over on email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or as a voice note to our WhatsApp number: 07543 306807.</p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Paint
Aug 4, 202227 min<p>We watch paint dry for you to find out if pricey paint is worth it.</p><p>Domestic interior wall paint comes in many different pots, colours, types and price points. However some claim the extra pennies mean they’re not only better quality and offer a better finish, but that they’re better for the environment too. </p><p>Listener Emily got in touch on WhatsApp after she bought a house that needs redecorating. She has six children, two dogs, two tortoises, two ducks and five chickens, so is very much in need of a paint that will offer good coverage, but be wipeable, and durable too, and wants to know if she needs to pay more to get that?</p><p>She also wanted to know about VOCs – Volatile Organic Compounds – that the expensive paints say they don’t contain, and if she buys a cheaper paint will any of these VOCs harm her kids and the environment?</p><p>Greg Foot finds this out by speaking to a paint inspector, and testing out differently priced paints with a painter and decorator to find out which ones meet the promises they’re making. </p><p>This series, we’re testing your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there’s any evidence to back up a claim, drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807</p><p>PRESENTER: Greg Foot PRODUCER: Kate Holdsworth</p>

Massage Guns
Jul 28, 202225 min<p>Can massage guns from the likes of Theragun, Pulse Roll and others brands, help you warm up before exercise and recover more quickly after it?</p><p>Massage guns are one of the biggest-selling fitness devices of the past few years. They have a vibrating silicone head that delivers percussive pressure onto the muscle. </p><p>Manufacturers claim ‘vibration’ therapy increases bloodflow and helps the user warm up before exercise, perform better during it AND ease soreness afterwards. But does it?</p><p>Listener Clare got in touch after she bought one following a tip-off from a friend that they could help relieve aches and pains after a run (including a bad back) as well as her husband’s sore shoulder.</p><p>Greg Foot finds out if those claims are true by speaking to manufacturers, leading physiotherapists and scientists involved in the latest research.</p><p>This series, we’re testing your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there's any evidence to back up a claim drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807</p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Fat Burning Pills
Jul 21, 202226 min<p>Is there really a pill that can help you burn fat? Sticking to a good diet and exercising to lose weight takes hard work and discipline, so what if there was something you could take that could do some of that work for you?</p><p>Listener June got in touch wanting to know if this is the case, or if it’s too good to be true? Are there really pills being sold online and on the high street that can help you burn fat, or speed up your metabolism?</p><p>Greg Foot investigates, hearing from some people who’ve tried them, scientists and dieticians about what exactly is in these pills, and asking if there is any evidence to back up their claims that they can burn fat. </p><p>This series, we’re testing your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there's any evidence to back up a claim drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807 </p><p>PRESENTER: Greg Foot PRODUCER: Kate Holdsworth</p>

Sunglasses
Jul 14, 202225 min<p>Do more expensive pairs better protect your eyes? Whether you’re hoping to catch some rays here in the UK or heading abroad for summer sun, you’ll want to think about protecting your eyes from the harmful UV in those rays. But how much do you need to spend on sunglasses to keep you safe?</p><p>Listener Wayne got in touch wanting to know the answer. He also wondered whether darker tints better protect his eyes, and asked what the term ‘polarised’ means, and whether he should ensure any new pair are exactly that?</p><p>Greg Foot sets out to investigate, testing sunglasses ranging in price from £2.50 to over a hundred pounds - do they deliver on their UV protection? The results are surprising... </p><p>This series, we’re testing your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there's any evidence to back up a claim drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807</p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Manuka Honey
Jun 30, 202223 min<p>A small jar of this sticky stuff can cost anything from around ten pounds to over a thousand. Some brands claim it can help with sore throats, skin problems, hay-fever and poor sleep. Other producers curiously make no health claims at all about their manuka products. So what’s the buzz about and is there any science behind it? </p><p>Listener and beekeeper David got to get in touch to ask whether manuka honey can boost the immune system, and if it has any benefits over and above the ordinary honey from his bees produce. </p><p>Greg Foot gets stuck in to find out, talking with two microbiologists to learn why manuka honey is different and if there’s any truth to some of those sweet sounding claims. </p><p>This series, we’re testing your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there's any evidence to back up a claim drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807</p><p>Presenter: Greg Foot Producers: Julian Paszkiewicz & Kate Holdsworth Researcher: Darcy Tapley</p>

Air Fryers
Jun 23, 202230 min<p>It seems like everyone’s talking about air fryers. They were recently dubbed the product that defined 2021, with sales up by 400%. But how do they fry with air?</p><p>Listener Sally in Harrogate has another question too: at a time when the cost of living is rocketing will cooking with an air fryer save her money? </p><p>And, because they use little to no oil, is cooking food in an air fryer also “healthier”? </p><p>Greg Foot investigates, speaking to a food scientist at Imperial College London and the BBC’s Good Food Magazine, to find out whether the claims being made around air fryers live up to the hype or are just marketing BS.</p><p>This series, we’re testing your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there's any evidence to back up a claim drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807</p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Air Purifiers
Jun 16, 202225 min<p>Air purifiers have become one of the most popular home gadgets in recent years and you can spend hundreds of pounds on the top-end models. They promise to remove harmful pollutants in the air, reduce the symptoms of allergies and help you breathe more easily in a more healthy environment. But what's the evidence around how effective they are? </p><p>Listener Laura, a respiratory doctor, got in touch wanting to know whether they work and even if they could help some of her patients in their daily lives. </p><p>Greg Foot investigates the science behind the product, speaking to experts to find out just how many pollutants are being pulled from thin air, the effective range of air purifiers and whether there are any downsides to how they work.</p><p>This series, we’re testing your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there's any evidence to back up a claim drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807</p><p>PRESENTER: Greg Foot PRODUCERS: Kate Holdsworth and Julian Paszkiewicz</p>

Carbon Negative and Carbon Offsetting
Jun 9, 202225 min<p>Brands are promising to plant a tree for each can of beer, tshirt, or pair of trainers you buy, offsetting their carbon emissions so they can put an attractive ‘carbon negative’ sticker on a product to show green they - and you - truly are. But how effective is a new forest at offsetting a company’s emissions, what does ‘carbon negative’ really mean, and how do they go about proving they’ve achieved it? </p><p>Trees are just one type of carbon offset. Another, albeit promising but expensive, option is Direct Air Capture. Could that be the future of long term carbon offsetting? Greg Foot finds out. </p><p>This series, we’re testing your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there's any evidence to back up a claim drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or you can send us a voice note to our new WhatsApp number: 07543 306807</p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Meal Replacement Drinks
Jun 2, 202225 min<p>Huel and Soylent are two of the best known names in ‘complete nutrition’ drinks. More of us are trying them and you can now get pre-made bottles of these concoctions in the food aisle in supermarkets. Firms sell them as an instant alternative to breakfast, lunch and dinner too. </p><p>But how ‘nutritionally complete’ are these liquid lunches? </p><p>Listener Tom admits snacking on one in the middle of the afternoon but has questions. Does the fact they start as an ultra processed powder affect how healthy they are? Is it possible to live on them and nothing else? </p><p>Greg Foot investigates. He talks to a registered dietician, a researcher on a new trial into these products, and Huel's co-founder and Head of Sustainable Nutrition, James Collier. </p><p>In this series, we’re testing your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there's any evidence to back up the makers' claims drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a></p><p>Presenter: Greg Foot Producer: Julian Paszkiewicz</p>

Electric Toothbrushes (& Water Flossers)
May 26, 202225 min<p>Take a look down the aisle of any high street chemist and the array of electric toothbrushes on offer is as dazzling as the teeth they promise to give you. You can pay upto £500 for the latest versions whiose myriad features include interactive apps that give you feedback on your brushing technique.</p><p>The market is dominated by two big brands, both promising a ‘professional’ clean: Oral B, whose iO brush has an oscillating action and Philips’ Sonicare, which uses tens of thousands of vibrations every minute to clean your teeth.</p><p>After having to pay a lot more for private treatment because she couldn’t find an NHS dentist in her area, listener Holly got in touch to ask whether getting an electric brush might save her trips to the dentist in future. And wouldcould a more expensive brush really clean her teeth better than a cheaper electric one? Or even the trusty traditional (and far cheaper) manual one she currently uses?! </p><p>Greg takes to the dentists chair to find out, testing both the Oral B and Philips brands as well as one of the latest trends – water flossing, which claim even better results than regular flossing with tape or interdental brushes. Is it the best thing since sliced bread? Or marketing BS? </p><p>Greg guests this episode include a dental expert who's been studying electric brushes since their inception and the consumer group Which? who ranked electric toothbrushes in a recent consumer test of their own.</p><p>This series, we’re testing your suggested wonder-products. Seen an ad, trend or fad and wonder if there's any evidence to back up the claim? Tell us! Drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> . </p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Blue Light Filtering Glasses
May 19, 202224 min<p>According to some businesses, the laptop, phone and TV screens we use every day are causing us big problems. </p><p>They claim these devices emit concentrations of "harmful blue light" which leaves us with tired eyes and poor sleep. One firm goes even further by suggesting this may contribute to a worrying long term condition, macular degeneration which leaves you with a permanent black hole in the centre of your vision.</p><p>Their solution? A pair of trendy looking spectacles which claim to filter out this blue light. </p><p>Listener, Sophie spends roughly 12 hours a day at a screen of some sort. She bought a pair but isn't sure if they work. So she's asked Greg to look into them and find out. </p><p>We get answers from two leading lights in the science of our eyes. Professor John O'Hagan has been a public health scientist for 46 years and is Visiting Professor in Laser and Optical Radiation Safety at Loughborough University. </p><p>Greg also meets sleep expert Russell Foster, professor of Circadian Neuroscience at the University of Oxford who's been researching body clocks for 38 years. </p><p>We put the evidence directly to Dhruvin Patel. He's the boss of one of the largest blue light filtering brands, Ocushield which turned over £2m last year.</p><p>How does he respond? And will Sophie keep using her trendy specs? </p><p>This series, we’re testing your suggested wonder-products. Seen an ad, trend or fad and wonder if there's any evidence to back up the claim? Tell us! Drop us an line to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> . </p><p>Presenter: Greg Foot Producer: Julian Paszkiewicz</p>

Personalised Vitamin Plans
May 12, 202225 min<p>The vitamins market is growing fast, with many companies now offering bespoke vitamin plans that claim to produce the perfect personalised prescription just for you.</p><p>Our listener Gareth wants to know if this could be a quick fix for his low energy and poor diet so Greg is going to find out. He’s got his sights on the popular companies suggesting personalised plans based on a simple online questionnaire that builds up a picture of your vitamin deficiencies via questions about your exercise, stress levels, diet and more.</p><p>But these personalise plans comes at a premium - some go for close to £25 per month. Greg tests the questionnaires, speaks with nutritional experts, and sees whether Gareth thinks personalised vitamin plans are the best thing since sliced bread, or marketing BS.</p><p>This season we’re testing YOUR suggested wonder-products. If you’ve seen an advert, trend or fad and want to know what the evidence says drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or drop Greg a message direct on his social media where he’s @gregfoot</p><p>PRESENTER: Greg Foot PRODUCER: Simon Hoban</p>

Running Shoes
May 5, 202225 min<p>They cost anything from less than £20 to more than £250. So how do you pick the right pair? And will paying more make you run faster?</p><p>With the ‘Couch to 5K’ app breezing past 5 million downloads, and marathon season well underway, two listeners ask Greg: What will they get for the extra money? A shoe more suited to their running style? More cushioning and fewer injuries? And will a top of the range pair with a carbon plate in the sole make them faster? </p><p>Greg Foot gets the answers from biomechanist, Dr Hannah Rice and sports technologist Professor Mike Caine. Plus, running writer, journalist and world record holder [for the fastest marathon in a full body animal costume (female)], Kate Carter. </p><p>This season we’re testing YOUR suggested wonder-products. If you’ve seen an advert, trend or fad and want to know what the evidence says drop us an email to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or drop Greg a message direct on his social media where he’s @gregfoot</p><p>Presenter: Greg Foot</p><p>Producer: Julian Paszkiewicz</p>

Air Source Heat Pumps
Apr 28, 202225 min<p>One of your most requested ‘wonder-products’ so far. Heat pumps are promising to not only make our houses greener but to also cut our energy bills. But will they? The Government says every home could have one and have reintroduced grants to help buy them. However Nick wants to know if an air source heat pump would be suitable for the 1930s house he’s about to move into with his family. Given the higher cost of the unit and the extra insulation he needs, will he actually be better off with a new combi boiler instead? Greg speaks to experts, does a survey on his own home and gets Nick answers so he can decide if a heat pump, for him, would be the best thing since sliced bread. Do you have a suggestion of a ‘wonder-product’ making a bold claim that Greg can investigate next? </p><p>Send us your suggestions to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or send it to Greg direct on twitter or instagram where he’s @gregfoot</p><p>PRESENTER: GREG FOOT PRODUCER: SIMON HOBAN</p>

Wagyu Beef
Apr 22, 202225 min<p>For many beef connoisseurs, a wagyu steak is the tenderest meat money can buy. They say it literally melts in the mouth. But Pete wants to know, if a Wagyu steak can set you back £100, how can supermarkets sell Wagyu burgers for around £3.50 a pair? How much of what makes wagyu beef so prized trickles down into a burger?</p><p>Greg speaks to meat scientist, Martin Anderson, visits a Wagyu farm in Yorkshire, and sets up a blind taste test. All to find out if Wagyu burgers are the best thing between sliced bread. </p><p>Do you have a suggestion of a ‘wonder-product’ making a bold claim that Greg can investigate next? </p><p>Send us your suggestions to <a href="mailto:sliced.bread@bbc.co.uk">sliced.bread@bbc.co.uk</a> or send it to Greg direct on Twitter or Instagram where he’s @gregfoot PRESENTER: GREG FOOT PRODUCERS: JULIAN PASZKIEWICZ & KEVIN CORE</p>