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Sliced Bread

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 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.

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  • 205 - 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

    Thu, 09 Apr 2026
  • 204 - Dough - 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

    Thu, 02 Apr 2026
  • 203 - Dough - 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

    Thu, 26 Mar 2026
  • 202 - Dough - 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.

    Thu, 19 Mar 2026
  • 201 - Dough - Trains

    Could ticketless travel and satellite connectivity be coming to our rail network?

    Greg Foot examines the rise of future wonder products.

    He's joined by experts, entrepreneurs and industry innovators to discuss the trends we're seeing today and where they may lead us tomorrow, before a leading futurist offers their predictions on what life might be like within five, ten and fifty years.

    In this episode Greg hears how renationalisation, digital signalling, satellite connections, ticketless technology and battery power might transform our trains in the future.

    With him is the futurist Tom Cheesewright and guests including:

    - Dickon Ross, Editor of Rail Magazine - Maggie Simpson OBE, Director General at the Rail Freight Group - Mike Butler, Director of Rail & Innovation at Clarus Networks

    Produced by Jon Douglas. Dough is a BBC Audio North Production for BBC Radio 4 and BBC Sounds.

    Thu, 12 Mar 2026
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