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

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

Collagen Supplements

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 January, 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. For this brand new series of Toast, episodes will be 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.Toast is a BBC Audio North production for BBC Radio 4.

Health & Fitness

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 January, 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. For this brand new series of Toast, episodes will be 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. Toast is a BBC Audio North production for BBC Radio 4.

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