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.

Michael Mosley finds out whether singing can boost feel-good chemicals in the brain and Dr Zoe Williams discovers why music could help people with dementia.

Michael Mosley and the doctors investigate what giving up alcohol for a month really does to your health, whether massage is worth the money, and whether medical cannabis is safe.