

Sliced Bread
BBC Radio 4
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.
Episodes
Mentioned books

Oct 16, 2025 • 25min
Scar Gels and Oils
Greg Foot speaks to Consultant Dermatologist and Dermatological Surgeon Dr Emma Craythorne - who has plenty of skin in the game - to find some answers for listener Phil about about scars, how they occur, the different types, and what might help make them less obvious. Each episode Greg investigates the latest ad-hyped products and trending fads promising to make us healthier, happier and greener. Are they really 'the best thing since sliced bread' and should you spend your money on them?At Sliced Bread, we're hungry for your suggestions so we can keep making fresh batches! If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at 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

Oct 9, 2025 • 31min
Creatine
Can creatine boost your body and mind?Listener Simon has been taking the fitness supplement creatine and wants to know if the science backs up the claim that it can make you stronger and faster. He's also heard that it can help with cognitive function. To find out if creatine can boost body and mind, presenter Greg Foot is joined by Graeme Close, Professor of Physiology at Liverpool John Moores University and Fabienne Sandkuhler, postdoctoral researcher at LMU Munich.Each episode Greg investigates the latest ad-hyped products and trending fads promising to make us healthier, happier and greener. Are they really 'the best thing since sliced bread' and should you spend your money on them?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

Oct 2, 2025 • 27min
Dough - The Future of Flight
Can supersonic air travel make a comeback?Greg Foot, host of the BBC Radio 4 show 'Sliced Bread', now brings you 'Dough'.Each episode explores future wonder products that might rise to success and redefine our lives.Experts and entrepreneurs discuss the trends shaping what today's everyday technology may look like tomorrow, before a leading futurist offers their predictions on what life might be like within five, ten and fifty years.This episode examines the future of flight. How could new, supersonic flights not cost the earth?
Will your future taxi be a flying one without a pilot?
Could a new shape for aeroplanes make them more spacious and efficient?Alongside Greg is the futurist, Tom Cheesewright, and expert guests Mariya Tarabanovska, an aerospace engineer and the founder of Flight Crowd, a non-profit educational organisation focused on electric aviation and Simon Davies, chief test pilot at Vertical Aerospace, a British aerospace technology company.This episode was produced by Jay Unger.Dough is a BBC Audio North Production for BBC Radio 4 and BBC Sounds

Sep 25, 2025 • 25min
Dough - The Future of Clothing
Could 'smart' clothing monitor our health?Greg Foot, host of the BBC Radio 4 show 'Sliced Bread', now brings you 'Dough'.Each episode explores future wonder products that might rise to success and redefine our lives.Experts and entrepreneurs discuss the trends shaping what today's everyday technology may look like tomorrow, before a leading futurist offers their predictions on what life might be like within five, ten and fifty years.This episode examines the future of our clothing.How can manufacturers dye clothes without using water?
Could 'smart' fabrics monitor weather conditions and provide extra warmth or cooling when we need it?
Will our body movements, instead of bulky batteries, provide the power for clothing to monitor our health?
Will synthetic material be completely replaced by natural fibres and those made from waste products? Greg is joined by the futurist, Tracey Follows, and expert guests Dr Marie O'Mahony, programme leader for E-textiles and Wearable Technologies at the Winchester School of Art at the University of Southampton and Jenny Prendergast, Programme Leader for Fashion and Design Technology at Loughborough University.This episode was produced by Jay Unger.Dough is a BBC Audio North Production for BBC Radio 4 and BBC Sounds

Sep 18, 2025 • 28min
Dough - The Future of Housebuilding
Could your future home be built by a robot bricklayer?Greg Foot, host of the BBC Radio 4 show 'Sliced Bread', now brings you 'Dough'.Each episode explores future wonder products that might rise to success and redefine our lives.Experts and entrepreneurs discuss the trends shaping what today's everyday technology may look like tomorrow, before a leading futurist offers their predictions on what life might be like within five, ten and fifty years.This episode examines the future of UK housebuilding.Will new homes be cheaper to run and built to a higher standard?
What potential do robots have to build quality homes quickly and cheaply?
Could building homes with bricks become a thing of the past?
Might 3D printing homes with concrete be a realistic alternative?
And will factories play a bigger part in meeting the demand for new housing?Alongside Greg is the futurist Tom Cheesewright and expert guests including Prof. Richard Fitton, Professor of Building Performance at the University of Salford and Salar al Khafaji, the CEO and founder of Monumental which builds autonomous on-site construction robots. Produced by Jon Douglas. Dough is a BBC Audio North Production for BBC Radio 4 and BBC Sounds.

Sep 11, 2025 • 27min
Dough - The Future of Home Parcel Delivery
Will delivery drones and robots make popping to the shops a thing of the past?Greg Foot, host of the BBC Radio 4 show 'Sliced Bread', now brings you 'Dough'.Each episode explores future wonder products that might rise to success and redefine our lives.Experts and entrepreneurs discuss the trends shaping what today's everyday technology may look like tomorrow, before a leading futurist offers their predictions on what life might be like within five, ten and fifty years.This episode looks at the future of home parcel delivery. One of the UK's biggest parcel delivery companies, Evri, explains why its trial of a robot delivery 'dog' will not spell the end for human couriers. A service already delivering coffee and groceries by drone in part of Dublin outlines its plans to take off in the UK.And Greg hears how looking to the past may improve home deliveries in future by making more of our inland waterways and rail network.Alongside Greg, delivering her expertise, is the futurist Tracey Follows and expert guests including:-Craig Noonan, UK Director of Communications and Brand at Evri
-Alan Hicks, Chief Technology Officer at Manna Drone Delivery
-Michelle Gardner, Deputy Director of Policy at the trade association, Logistics UKProduced by Jon Douglas. Dough is a BBC Audio North Production for BBC Radio 4 and BBC Sounds.

13 snips
Sep 4, 2025 • 28min
Dough - The Future of Cars
Tom Cheesewright, a renowned futurist with experience consulting for major car manufacturers, dives into the evolution of automotive technology. He discusses how electric vehicles could reshape transportation before 2030 and the potential of hydrogen as a fuel alternative. Cheesewright highlights the rise of smart cars equipped with real-time updates and app integrations, as well as the challenges faced by autonomous vehicles in gaining regulatory approval. The conversation also touches on the exciting future of vehicle-to-infrastructure communication, possibly leading to smarter traffic management.

12 snips
Aug 28, 2025 • 29min
Smart Doorbells
Join Andrew Loughlin, a principal researcher at Which, and Emmeline Taylor, a criminology professor, as they explore the fascinating world of smart doorbells. They dissect essential features like camera resolution and installation challenges. The conversation dives into privacy concerns, comparing cloud storage versus local recording for footage. They also discuss the contentious impact of these devices on crime rates, emphasizing the need for ongoing technological improvements. Will smart doorbells truly enhance home security, or are they overhyped?

13 snips
Aug 21, 2025 • 26min
Salt
In this engaging discussion, Paul Elliott, a Professor of Epidemiology and Public Health Medicine at Imperial College London, dives into the health effects of various salts. He breaks down the astonishing differences between refined and unrefined salts and reveals the hidden sodium in processed foods. The episode highlights the essential role of iodized salt for iodine intake and contrasts premium salts with standard options. Elliott also advocates for potassium-enriched salts as a healthier choice, making listeners rethink their salt habits for better health.

4 snips
Aug 14, 2025 • 31min
Nail Polish and Gels
Michelle Wong, a chemist and science communicator from Sydney, shares her expertise on the science behind beauty products, while Nyla Dinani, a consultant dermatologist, provides insights into nail health. They dive into the chemistry of nail polish, discussing ingredients like polymers and plasticizers. The risks of gel manicures, including UV exposure and allergic reactions, are examined. Additionally, they explore the differences between traditional nail polish and gel alternatives, highlighting safe application techniques and the truth behind marketing claims.