Summary: Michael Mosley finds out how learning a new language can help stave off dementia, surgeon Gabriel Weston asks whether 'detoxing' really works and GP Dr Zoe Williams looks at what you can do to improve your health if you're 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 whether man flu could actually be real.

Summary: Michael Mosley and team discover an easier way to keep fit and healthy, and Gabriel Weston finds out about an exciting breakthrough in gene therapy. Elsewhere in the programme, Giles Yeo looks at ways we can get more iron into our diet, and Alain Gregoire investigates what men can do to protect themselves from prostate cancer.

Summary: Michael Mosley finds out if a glass of wine can protect you from the harmful effects of junk food, and Gabriel Weston looks at what is safe to eat and drink when you are pregnant. Elsewhere, Giles Yeo sets out to test home breathalyser kits, and Zoe Williams finds out what you can do to improve your health if you are living with cancer.

Summary: Michael Mosley finds out whether singing can boost feel-good chemicals in the brain, Dr Zoe Williams discovers why music could help people with dementia, and Dr Alain Gregoire looks at some new research showing the surprising benefits of group singing for mothers with post-natal depression. Plus, Gabriel Weston investigates whether detoxing is a con.

Summary: Michael Mosley finds out how giving up alcohol for a month affects person's health, and Gabriel Weston investigates what is known about the risks and benefits of medicinal cannabis. Dr Zoe Williams reveals how to get the most out of a GP appointment, Dr Alain Gregoire discovers a surprising way massage benefits health, and Dr Giles Yeo finds out how to avoid exam stress.

Summary: Michael Mosley finds out whether t'ai chi an offer the same health benefits as vigorous exercise - without all the huffing and puffing. Surgeon Gabriel Weston discovers a pioneering new technology that is transforming complex brain surgery. Dr Giles Yeo asks what we can do about heartburn. Dr Zoe Williams asks - how safe are the medicines we buy online?