In this programme, Michael Mosley finds out how learning a new language can help stave off dementia. Surgeon Gabriel Weston asks whether detoxing really works. GP Dr Zoe Williams looks at what you can do to improve your health if you are living with heart disease. Psychiatrist Dr Alain Gregoire finds out whether a night-time tipple can really help you get to sleep. And Dr Giles Yeo asks, could man flu actually be real?

Michael Mosley finds out whether a glass of wine can protect your blood vessels from the harmful effects of junk food. Giles Yeo sets out to test home breathalyser kits - and uncovers a potentially dangerous weakness in the drink-drive laws in England, Wales and Northern Ireland. Zoe Williams finds out what you can do to improve your health if you are living with cancer. And Gabriel Weston has the lowdown on what is safe to eat and drink when you are pregnant.