Welcome to What’s Up Docs?, the podcast where doctors and identical twins Chris and Xand van Tulleken tackle the confusion around every aspect of our health and wellbeing.

This week, Chris and Xand are exploring the topic of nail health. As well as being useful tools on our hands and feet, nails can also be important signs of many diseases and disorders. But what exactly is a nail made of? How did nails evolve? And what should we be doing to keep them strong and healthy?

They speak to Dr Yusur Al-Nuaimi, Consultant Dermatologist at the Royal Devon and Exeter Hospital and Clinical Lead for the British Hair and Nail Society, to get some answers.

If you want to get in touch, you can email us at whatsupdocs@bbc.co.uk or WhatsApp us on 08000 665 123.

Presenters: Drs Chris and Xand van TullekenGuest: Dr Yusur Al-NuaimiProducers: William Hornbrook and Jo RowntreeExecutive Producer: Rami TzabarEditor: Kirsten LassAssistant Producer: Maia Miller-LewisTech Lead: Reuben HuxtableSocial Media: Leon Gower Digital Lead: Richard BerryComposer: Phoebe McFarlaneSound Design: Melvin Rickarby

At the BBC:Assistant Commissioner: Greg Smith Commissioning Editor: Rhian Roberts

A Loftus Media production for BBC Radio 4