Episode 3

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.