Sliced Bread

193 épisodes

Kitchen Knives and Sharpeners
19/2/2026 | 30 min
Which knife is best for the kitchen and how do you keep it sharp?
After buying various knives over the years that ended up blunt, listener Susan is looking for one that will last. She's seen an array of different types and materials: Damascus steel, Japanese Gyuto knives, as well as alloys and additions that promise a sharper edge. They vary hugely in price - anything from £50 to £1,000. And if you do invest, how do you keep a knife sharp?
To cut through the marketing BS, presenter Greg Foot is joined in the studio by Mark Miodownik, Professor of Materials & Society at University College London, and Rob Haslam aka Mr Knife Guy.
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 [email protected] OR send a voice note to our WhatsApp number, 07543 306807.
RESEARCHER: PHIL SANSOM
PRODUCERS: SIMON HOBAN AND GREG FOOT
VPNs
12/2/2026 | 27 min
Do you really need a VPN?
Listener Andrew has seen and heard lots of adverts for Virtual Private Networks (VPNs) and wants to know if they'll beef up the security on his computer. Will they provide extra protection from malware or hackers?
To get the answers, presenter Greg Foot is joined in the studio by Professor Victoria Baines, fellow of the Chartered Institute for IT.
All our investigations start with YOUR suggestions. If you have seen a wonder product promising to make you happier, healthier or greener, please do email us at [email protected] or send a voicenote to our Whatsapp number - 07543 306807.
RESEARCHER: PHIL SANSOM
PRODUCERS: SIMON HOBAN AND GREG FOOT
Kefir
05/2/2026 | 25 min
Listener Amanda was Kefir curious, and got in touch with Sliced Bread to ask if the Kefir she was consuming for breakfast every day – was really having an impact on her health, cognitive function, and her gut?
She wasn’t the only person to get in touch about kefir either, with others saying they keep seeing the benefits of fermented foods crowed about on social media. Greg Foot talks to head of the Food Biosciences department at the Irish National Research Body Teagasc, to get to the bottom of it.
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?
If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at [email protected] or send a voice note to our WhatsApp number, 07543 306807.
RESEARCHER: PHIL SANSOM
PRODUCERS: KATE HOLDSWORTH & GREG FOOT
Testosterone Replacement Therapy
29/1/2026 | 31 min
Can taking testosterone help with low libido and energy?
It's all over social media and is often touted by celebs - both male and female - but is testosterone replacement therapy the answer to listener Clive's low energy levels?
Clive got in touch after sending off for a blood test with an online health firm which showed he might have low testosterone and could be a candidate for therapy. But to buy it privately isn't cheap and once started, is a lifelong commitment. So is it worth the money?
Presenter Greg Foot is joined by President of the British Society of Sexual Medicine, Mike Kirby, as well as NHS GP and Director of Men's Health at Manual, Dr Jeff Foster.
If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at [email protected] or send a voice note to our WhatsApp number, 07543 306807.
RESEARCHER: PHIL SANSOM
PRODUCERS: SIMON HOBAN AND GREG FOOT
Dark Chocolate
22/1/2026 | 24 min
Listener Jenny, who enjoys a 90% cocoa bar from time to time, got in touch to ask if some of the reports that dark chocolate can have a positive effect on things like circulation and mood - have any truth behind them?
But Jenny also told Sliced Bread that since she read reports that heavy metals such as lead and cadmium could be in dark chocolate - she's been unable to enjoy her regular bar, until she knows it's safe to eat!
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?
If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener, email us at [email protected] or send a voice note to our WhatsApp number, 07543 306807.
RESEARCHER: PHIL SANSOM
PRODUCERS: KATE HOLDSWORTH & GREG FOOT

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À propos de Sliced Bread

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 [email protected] 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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