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Sleep is never more important than when you aren’t getting any. And there’s a large range of night time teas, herbal tablets and relaxing oils and sprays that promise to help you get some. But can they really deliver?

Listener Corrine got in touch after struggling with her sleep post menopause, wanting to know if there was any evidence to back up the claims of various natural sleep aids. Can they give her the restful night’s sleep she craves – or is it just a waste of money? She sets Greg Foot the job of finding out, by speaking to an expert sleep physiologist, as well as a professor in clinical pharmacology, therapeutics and toxicology.

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 WhatsApp number: 07543 306807.

PRESENTER: Greg Foot
PRODUCER: Kate Holdsworth