Trust Me, I'm a Doctor - Season 9

Michael Mosley tests how vigorously you really need to exercise to start seeing improvements to your physical and mental health. Alain Gregoire cures his lifelong phobia of heights in just two hours using virtual reality. Zoe Williams investigates whether the ten-minute one-to-one GP appointment could be under threat. Giles Yeo tests whether hot or cold drinks are better to cool you down. And Guddi Singh looks into a mystery illness that is often dismissed as a bout of morning sickness.

Michael Mosley and the doctors are back. Giles Yeo tests the extraordinary claim that eating less can boost your memory. Alain Gregoire discovers our body's secret built-in stress-buster. Zoe Williams reveals how to spot a hidden illness that can cause stillbirth. Michael uncovers how a simple magnet can save the sight of people with glaucoma. And in a special report, Dr Javid Abdelmoneim investigates what's really in the cannabis-based health products you can buy over the counter.

Can you eat yourself happy? Michael Mosley tests whether our diet can affect our mental health. Guddi Singh finds out the best way to calm a crying baby. Alain Gregoire uncovers the future tech that could tell us if we are developing dementia. Zoe Williams reveals a new treatment for psoriasis – a skin condition that affects over a million of us. And Michael tests how best to keep your dishes bug-free when you do the washing up.

Michael Mosley runs an experiment to test whether an extra hour a week in nature improves your physical and mental health. Alain Gregoire investigates a mysterious illness that can transform a child's personality overnight. Zoe Williams discovers the hidden body fat that can make us thin. Giles Yeo investigates whether trendy plant-based milks are any healthier than dairy. And Guddi Singh witnesses pioneering cancer surgery – using an intelligent knife that can detect tumours.

Michael Mosley tests whether yoga can lower your blood pressure as much as a workout, and Alain Gregoire tests meal replacement shakes to see if they are as healthy as they claim. Meanwhile, Zoe Williams discovers why wearing your contact lenses in the shower damage your eyesight, and Giles Yeo tests whether gourmet salts are any healthier than table salt.

In the final episode, Michael Mosley investigates whether simply thinking about food can help you lose weight, and Giles Yeo finds out how to keep your skin young and healthy. Meanwhile, Alain Gregoire tests whether listening to music improves your sleep, and Guddi Singh examines the latest diet in the headlines which claims to have a good impact on the planet.