This one's all about mushrooms - not so much your chestnut, button or portobellos from the supermarket, but more the likes of lion's mane, reishi and chaga. These much-feted fungi are claimed to offer all sorts of benefits, from relaxation to disease-fighting properties. We've had loads of questions about products containing them, particularly around mushroom coffee. Is there any evidence that it's better for you than your regular brew? Listener Leon is fond of it - and wants to know if there's any science to back up his inclination. To get him some answers, we hear from a registered nutritionist and a mycologist (fungi expert) who's just written a book all about medicinal mushrooms. So are they the best thing since Sliced Bread?
If you’ve seen an ad, trend or wonder product promising to make you happier, healthier or greener and want to know how it stacks up, then email us: sliced.bread@bbc.co.uk or send a voice note to our WhatsApp number: 07543 306807
PRESENTER: GREG FOOT PRODUCER: TOM MOSELEY