Trust Me, I'm a Doctor — Season 4

The doctors return to do more science research on the nation's behalf in this special programme. Dr Saleyha Ahsan and the University of Oxford test whether it is really possible to bust belly fat, and skin surgeon Gabriel Weston takes a special camera on the streets to see how protective sun cream actually is. And as the warmer weather tempts more of the population to do some exercise, GP Zoe Williams makes a guest appearance to test what it's really doing for people's health. Dr Chris van Tulleken and University of Nottingham measure whether the craze for high-intensity exercise is as beneficial as the hype would suggest, whilst Michael Mosley investigates some surprising ways to get the benefits of exercise without doing any at all.

It's a new year and another series of Trust Me, I'm a Doctor, ready to help you shake off the festive excesses. In this special New Year programme, Dr Saleyha Ahsan oversees a world-first experiment to see how we can burn more fat - without doing any more exercise. Michael Mosley gives a cheat's guide to a better body, with results that astonish the scientists. Dr Chris van Tulleken puts protein shakes to the test, and surgeon Gabriel Weston meets a woman who has sight restored for the first time in 16 years, thanks to a bionic eye.

Dr Chris van Tulleken runs a groundbreaking experiment with the University of Surrey to see whether simply changing our mealtimes can help us all lose weight, whilst Gabriel Weston looks at whether diet products could actually be making us put it on! Dr Saleyha Ahsan investigates the chemicals sprayed around our houses, and Michael Mosley gets to the truth about alcohol: can it be good for our health? Plus the story of a 12-year-old girl undergoing a new treatment for peanut allergy, and how to treat someone having an allergic reaction.

The doctors are in Glasgow where they discover whether olive oil is healthy using a cutting edge technique. Meanwhile, Dr Chris van Tulleken investigates whether beards are unhygienic, Michael Mosley finds out about meat, and Dr Saleyha Ahsan hears from survivors of sepsis about the warning signs of the little-known condition

In the final episode of the series, the doctors reveal the secrets to how we can all stick to those health resolutions we made at New Year, but are already struggling to keep. Surgeon Gabriel Weston experiments with a herbal supplement said to help us drink less alcohol, Dr Chris van Tulleken reveals some unusual ways to get a better night's sleep, and Michael Mosley uncovers the secret of staying motivated. Meanwhile, Dr Saleyha Ahsan tests some revolutionary new science that could help us all easily lose weight and be healthier.