Sliced Bread

Sliced Bread

By BBC Radio 4

The latest ad-hyped products and trending fads promise to make us healthier, happier and greener, but are they really 'the best thing since sliced bread'? Greg Foot finds out.

Episodes

Collagen Supplements

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? 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.” Other listeners asked whether it can help with joint aches and pains, or strengthen nails? 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. 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807. PRESENTER: Greg Foot PRODUCER: Simon Hoban
24/11/22·29m 21s

Wake Up Lights & SAD Lamps

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. 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? 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. 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807. PRESENTER: Greg Foot PRODUCER: Kate Holdsworth
17/11/22·32m 52s

Portable Heaters

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. 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. 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? 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807. PRESENTER: GREG FOOT PRODUCER: SIMON HOBAN
10/11/22·28m 48s

Natural Deodorants

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. 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? 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. 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. 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807. PRESENTER: Greg Foot PRODUCER: Kate Holdsworth
03/11/22·27m 15s

Bonus Episode: Sliced Bread Meets All Consuming

Sliced Bread host Greg Foot talks to presenters Charlotte Williams and Amit Katwala about All Consuming, their new series exploring products that have changed the world. You can listen to the series by searching for All Consuming on BBC Sounds.
25/08/22·5m 50s

Compression leggings, Bath salts, Water softeners and filters

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? 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. 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. 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. 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. Keep your suggestions coming for wonder-products you’d like us to investigate. Send them over on email to sliced.bread@bbc.co.uk or as a voice note to our WhatsApp number: 07543 306807. PRESENTER: Greg Foot PRODUCER: Kate Holdsworth
18/08/22·27m 51s

Dog food, Diet fizzy drinks, Mouthwash

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? 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. 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. 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. 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! Keep your suggestions coming for wonder-products you’d like us to investigate. Send them over on email to sliced.bread@bbc.co.uk or as a voice note to our WhatsApp number: 07543 306807. PRESENTER: Greg Foot PRODUCER: Simon Hoban
11/08/22·25m 58s

Paint

We watch paint dry for you to find out if pricey paint is worth it. 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. 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? 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? 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. 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807 PRESENTER: Greg Foot PRODUCER: Kate Holdsworth
04/08/22·27m 22s

Massage Guns

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? 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. 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? 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. Greg Foot finds out if those claims are true by speaking to manufacturers, leading physiotherapists and scientists involved in the latest research. 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807 PRESENTER: Greg Foot PRODUCER: Simon Hoban
28/07/22·24m 58s

Fat Burning Pills

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? 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? 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. 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807 PRESENTER: Greg Foot PRODUCER: Kate Holdsworth
21/07/22·25m 54s

Sunglasses

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? 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? 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... 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807 PRESENTER: Greg Foot PRODUCER: Simon Hoban
14/07/22·24m 41s

Manuka Honey

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 buzz about and is there any science behind it? Listener and beekeeper David got to get in touch to ask: whether manuka honey can boost the immune system and whether it has any benefits over and above the ordinary honey from his bees produce? 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. 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807 Presenter: Greg Foot Producers: Julian Paszkiewicz & Kate Holdsworth Researcher: Darcy Tapley
30/06/22·23m 15s

Air Fryers

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? 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? And, because they use little to no oil, is cooking food in an air fryer also “healthier”? 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. 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807 PRESENTER: Greg Foot PRODUCER: Simon Hoban
23/06/22·30m 14s

Air Purifiers

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? 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. 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. 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807 PRESENTER: Greg Foot PRODUCERS: Kate Holdsworth and Julian Paszkiewicz
16/06/22·24m 43s

Carbon Negative and Carbon Offsetting

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? 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. 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 sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807 PRESENTER: Greg Foot PRODUCER: Simon Hoban
09/06/22·25m 25s

Meal Replacement Drinks

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. But how ‘nutritionally complete’ are these liquid lunches? 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? 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. 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 sliced.bread@bbc.co.uk Presenter: Greg Foot Producer: Julian Paszkiewicz
02/06/22·24m 51s

Meal Replacement Drinks

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. But how ‘nutritionally complete’ are these liquid lunches? 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? 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. 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 sliced.bread@bbc.co.uk Presenter: Greg Foot Producer: Julian Paszkiewicz
02/06/22·24m 51s

Electric Toothbrushes (& Water Flossers)

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. 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. 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?! 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? 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. 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 sliced.bread@bbc.co.uk . PRESENTER: Greg Foot PRODUCER: Simon Hoban
26/05/22·24m 53s

Blue Light Filtering Glasses

According to some businesses, the laptop, phone and TV screens we use every day are causing us big problems. 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. Their solution? A pair of trendy looking spectacles which claim to filter out this blue light. 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. 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. 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. 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. How does he respond? And will Sophie keep using her trendy specs? 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 sliced.bread@bbc.co.uk . Presenter: Greg Foot Producer: Julian Paszkiewicz
19/05/22·24m 4s

Personalised Vitamin Plans

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. 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. 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. 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 sliced.bread@bbc.co.uk or drop Greg a message direct on his social media where he’s @gregfoot PRESENTER: Greg Foot PRODUCER: Simon Hoban
12/05/22·24m 34s

Running Shoes

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? 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? 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. 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 sliced.bread@bbc.co.uk or drop Greg a message direct on his social media where he’s @gregfoot Presenter: Greg Foot Producer: Julian Paszkiewicz
05/05/22·24m 31s

Air Source Heat Pumps

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? Send us your suggestions to sliced.bread@bbc.co.uk or send it to Greg direct on twitter or instagram where he’s @gregfoot PRESENTER: GREG FOOT PRODUCER: SIMON HOBAN
28/04/22·25m 1s

Wagyu Beef

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? 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. Do you have a suggestion of a ‘wonder-product’ making a bold claim that Greg can investigate next? Send us your suggestions to sliced.bread@bbc.co.uk or send it to Greg direct on Twitter or Instagram where he’s @gregfoot PRESENTER: GREG FOOT PRODUCERS: JULIAN PASZKIEWICZ & KEVIN CORE
22/04/22·25m 15s

Sustainable Jeans

“Make better. Buy better. Wear it longer.” Lots of fashion brands are including claims like this in their adverts and one item of clothing that’s really getting the stamp of supposed “sustainability” is jeans. Maddie has asked Greg to look into what “sustainability” actually means when it comes to denim. Is it a term that marks genuine eco-impact, or is it more marketing BS? And, as adverts claim, do “sustainable” jeans last longer? Greg speaks to an organisation that rates clothing brands’ sustainability credentials and visits Manchester Metropolitan University to hear the results of their ‘rub test’. Do you have a suggestion of a ‘wonder-product’ making a bold claim that Greg can investigate next? Send us your suggestions to sliced.bread@bbc.co.uk or send it to Greg direct on Twitter and Instagram where he’s @gregfoot PRESENTER: GREG FOOT PRODUCER: JULIAN PASZKIEWICZ
14/04/22·25m 21s

Electric Cars

Read Greg's blog for more info on the considerations and calculations made in this episode: https://www.gregfoot.com/post/should-you-switch-to-an-electric-car Electric Vehicles: Should you switch? In the first of this new series Greg runs Julian’s suggested wonder-product through the evidence mill and asks whether electric vehicles (EVs) really are the best thing since sliced bread? Julian has heard that switching his old petrol-guzzling banger for a shiny new EV will make him greener? But will it? Electric cars are said to be ‘cleaner’ and ‘cheaper’ to run, but with a higher purchase price than their petrol equivalent - and a greater environmental footprint of manufacture - how many miles would Julian need to drive before his fuel savings off-set these initial costs - both financially and environmentally? Greg tests one of the most popular cars in the UK and hears from experts including Mike Berners-Lee & Vicky Parrot to conclude whether electric vehicles are worth the hype, and your money. And he wants YOUR suggestions for what to investigate next! Is there something you keep seeing on TV - or hearing about on a podcast? Have you spotted something trending on Instagram or TikTok and you want to know if it delivers? Send us your suggestions to sliced.bread@bbc.co.uk or send it to Greg direct on twitter or instagram where he’s @gregfoot PRESENTER: GREG FOOT PRODUCER: JULIAN PASZKIEWICZ
07/04/22·29m 41s

Sliced Bread is back!

Greg Foot is back to investigate more ad-hyped products and trending fads promising to make us healthier, happier and greener. From personalised vitamin plans to NFTs, mindfulness apps to ‘sustainable’ jeans, Greg will find out if the latest wonder-products really are 'the best thing since sliced bread’. And he wants YOUR suggestions for what to investigate! Is there something you keep seeing on TV or hearing about on a podcast? Have you spotted something trending on Instagram or TikTok and want to know if it delivers? Send us your suggestions to sliced.bread@bbc.co.uk or send them to Greg direct on Twitter or Instagram where he’s @gregfoot.
06/04/22·2m 27s

Noise Cancelling Headphones

Whether it’s cutting out the background chatter to hear the radio, or drowning out the snoring coming from the room next door, the promise of noise cancelling headphones is enticing. But do they live up to the marketing hype? Are they The Best Thing Since Sliced Bread, or BS? Greg Foot is joined by BBC 6 Music DJ & Host Mary Anne Hobbs, who lends her professional ear to a pair of noise cancelling headphones. While acoustic engineer Professor Trevor Cox unpicks the science fact from the science fiction. Presenter: Greg Foot Producer: Beth Eastwood
06/05/20·20m 48s

Teeth Whitening

Teeth whitening toothpastes, strips and gizmos are more popular than ever. But what is the evidence that any of them actually work? And what about the HiSmile Teeth Whitening Kit that's been doing the rounds on social media? Are these products The Best Thing Since Sliced Bread or marketing BS? Greg Foot talks to fashion commentator and broadcaster, Grace Woodward about her experience with these products while Professor Martin Ashley, Consultant in Restorative Dentistry at the University Dental Hospital of Manchester, is on hand to separate the science fact from the science fiction. Presenter: Greg Foot Producer: Beth Eastwood
29/04/20·22m 53s

Sunscreen

We all know that sunscreen helps to protect our skin from the sun’s burning rays, but are you sure you’re using the right one? Do you struggle to untangle the UVAs from the UVBs, and the SPFs from the star-ratings? Greg Foot talks to Antonia Mariconda, beauty writer and founder of the Safety in Beauty Campaign, who knows just how baffled consumers are. On hand to decode the sunscreen labelling is Dermatologist, Dr Andrew Birnie, from East Kent Hospital University NHS Foundation Trust. Common claims, such as ‘waterproof’ and ‘reef safe’ are also put through the evidence mill. Producer: Beth Eastwood
22/04/20·23m 47s

CBD Products (Cannabidiol)

CBD, short for cannabidiol, is one of the big buzzwords in health and well being products. A naturally occurring molecule of the cannabis plant, it’s popping up in everything - aside from the CBD oil tinctures, you can now eat it, down it in drinks, vape it, lather it on your skin and soak in it. You can even buy sports leggings infused with it. Consumer interest in CBD-based products shows no sign of abating, with enthusiasts claiming a whole host of benefits from relieving anxiety, to easing pain and helping us sleep. The theory behind how CBD might work seems promising - CBD shares similarities with endocannabinoids, produced naturally in the body, which help to regulate stress, sleep, metabolism, memory, inflammation, and immunity. Given the deluge of different CBD-based products, should we really believe the hype? Greg Foot talks to beauty columnist Sali Hughes and Saoirse O’Sullivan, an expert in cannabinoid research, to find out if these products really are The Best Thing Since Sliced Bread. Produced by Beth Eastwood.
15/04/20·21m 54s

Caffeine Shampoo

Can caffeine hair products prevent our hair from getting thinner as we get older and, even better, reverse the process? Or does this ingredient just end up going down the plughole? Joining Greg Foot in the studio is Ian Carmichael, Senior Director in Styling at Trevor Sorbie, the Hair Salon, who styles many high profile heads including Her Majesty the Queen’s. Dermatologist Dr Paul Farrant, from Brighton and Sussex University Hospitals Trust, is on hand to put two products through the evidence mill, separating the facts from the fads to reveal whether caffeine hair products really are The Best Thing Since Sliced Bread. Produced by Beth Eastwood.
08/04/20·29m 27s

We’re back!

Greg Foot looks ahead to the second series of The Best Thing Since Sliced Bread?
03/04/20·58s

Goop Lab Special

As the Goop Lab TV series lands in Netflix accounts, Greg Foot and guests look at the scientific evidence for the therapies tried out by Goop staff, including Gwyneth Paltrow herself. Dr James Rucker, lead on the psilocybin trials at Kings College, London, talks about psychedelic therapy, and Dr Sarah Davey, Lecturer in Sport & Exercise Science, Oxford Brookes University, discusses the evidence for cold water therapy. To check out if there's any science behind vampire facials and other skin treatments Greg turns to Dr Nisith Sheth, dermatologist at St John’s Institute of Dermatology, Guy’s and St Thomas’ Hospitals. Professor Edzard Ernst, Emeritus Professor of Complementary Medicine at the University of Exeter, is our reviewer of the evidence for the effects of Reiki and other forms of energy healing. And gynaecologist and pain specialist, Dr Jen Gunter, author of The Vagina Bible, is our expert on what the Goop Lab says about how women can have better sex.
24/01/20·1h 7m

Sports pain: Taping

We’ve all seen athletes sporting brightly coloured stripes on the backs of their legs – but is kinesiology tape all it’s cracked up to be? Presenter Greg Foot is joined by Olympic medallist heptathlete Kelly Sotherton, along with consultant rheumatologist Dr Benjamin Ellis and Manchester United FC’s head of physical therapies Prof Michael Callaghan, to ask whether these products can, as some claim, help athletes train for longer and finish stronger?
27/02/19·22m 38s

Sports pain: Gels and sprays

Do topical pain products really relieve aching muscles? Presenter Greg Foot is joined by Olympic medallist heptathlete Kelly Sotherton, along with consultant rheumatologist Dr Benjamin Ellis and Manchester United FC’s head of physical therapies Prof Michael Callaghan, to test the cooling gels and warming sprays that promise to reach deep into painful joints. Presenter: Greg Foot Producer: Marijke Peters Editor: Rami Tzabar Sound Editing: Giles Aspen
27/02/19·34m 21s

Health drinks: Turmeric

Can turmeric lattes prevent memory loss? Greg Foot is joined by Blur’s Alex James and experts to put claims about this ancient Indian spice to the test. Presenter: Greg Foot Producer: Marijke Peters Studio Manager: Sue Maillot Editor: Rami Tzabar
20/02/19·20m 0s

Health drinks: Kombucha

Does kombucha boost your immune system? Greg Foot is joined by Blur’s Alex James and experts to put this fermented wonder drink to the test. Presenter: Greg Foot Producer: Marijke Peters
20/02/19·26m 48s

Winter bugs: Vitamin C and zinc

Vitamin C is one of the most popular products used to combat the common cold. But does it work? Greg Foot reviews the evidence for both vitamin C and zinc to see if they are The Best Thing Since Sliced Bread. He’s joined again by podcaster, rapper and actor Scroobius Pip and virologist Wendy Barclay from Imperial College London. The team will be giving you their Top Tips, backed by real scientific evidence, for beating the winter bugs. Presenter: Greg Foot Producer: Michelle Martin Researcher: Amelia West Studio Managers: Emma Harth, John Boland Editors: Deborah Cohen, Rami Tzabar The Best Thing Since Sliced Bread is a BBC Science Radio Unit Production.
13/02/19·24m 36s

Winter bugs: Hand sanitisers

With offices and schools set to a soundtrack of sniffles, science presenter and YouTuber Greg Foot is on mission to find 'The Best Thing Since Sliced Bread' to beat the winter bugs. Joining him for this double episode is rapper, podcaster and actor Scroobius Pip, a man for whom protecting his voice is a professional priority. Under the microscope today are those handy hand sanitisers that promise to stop bacteria and viruses in their tracks. Virologist Wendy Barclay from Imperial College London and microbiologist Lindsay Hall from the Quadram Institute in Norwich are both on hand to help separate the facts from the fads, to decide if these products really are The Best Thing Since Sliced Bread. Presenter: Greg Foot Producer: Michelle Martin Researcher: Amelia West Studio Managers: Emma Harth, John Boland Editors: Deborah Cohen, Rami Tzabar The Best Thing Since Sliced Bread is a BBC Science Radio Unit Production.
13/02/19·32m 22s

Skincare: Activated charcoal

Will activated charcoal, which these days can be found in everything from face creams to smoothies, really purify your pores? Science presenter and YouTuber Greg Foot is on a mission to bust marketing BS, looking for the facts behind the fads and challenging products’ bold claims with scientific evidence. In the second episode, Greg is joined by actress and beauty blogger Rebecca Humphries, consultant dermatologist Dr Emma Wedgeworth and Cambridge Professor of Chemistry, Melinda Duer to explore the science behind activated charcoal - could it act as a 'magnet' to draw out dirt and pollution from your pores as some products claim? Presenter: Greg Foot Producer: Graihagh Jackson Studio Manager: John Boland Editor: Rami Tzabar The Best Thing Since Sliced Bread is a BBC Science Radio Unit Production
06/02/19·20m 11s

Skincare: Collagen

Can collagen face cream reduce wrinkles and make your skin more youthful? Science presenter and YouTuber Greg Foot is on a mission to bust marketing BS, looking for the facts behind the fads and challenging products’ bold claims with scientific evidence. In the first episode, Greg is joined by actress and beauty blogger Rebecca Humphries, consultant dermatologist Dr Emma Wedgeworth and Cambridge Professor of Chemistry, Melinda Duer to explore the science behind collagen face creams – can they really ‘boost’ and ‘support’ collagen production as some products claim? Presenter: Greg Foot Producer: Graihagh Jackson Studio Manager: John Boland Editor: Rami Tzabar The Best Thing Since Sliced Bread is a BBC Science Radio Unit Production
06/02/19·24m 50s

Welcome to The Best Thing Since Sliced Bread?

From kombucha to collagen, activated charcoal to sports tape, Greg Foot is on a mission to bust the marketing BS, looking for the facts behind the fads and to challenge a product’s bold claims with scientific evidence. Joined by leading experts and friends from the world of podcasting and social media, Greg investigates the latest crazes to hit the high street to work out if these wonder products really are the best thing since sliced bread. (all subject to updates)
05/02/19·2m 24s
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