Summary: Michael Mosley and the doctors set up experiments to get to the truth behind health claims and headlines. Dr Chris van Tulleken teams up with Nottingham University to see whether high-intensity exercise is as good for us as is claimed, guest presenter Dr Zoe Williams gets a group of volunteers to help put some home fitness monitors to the test, and Michael Mosley investigates whether acupuncture really does have a scientific basis.

Summary: This time, Michael Mosley reveals a new discovery that could help us all improve our eyesight and Dr Chris van Tulleken carries out an experiment with the University of Worcester to find out whether the fad for going gluten free can be good for us. Surgeon Gabriel Weston witnesses a breakthrough that could cure rheumatoid arthritis and other autoimmune diseases and Dr Saleyha Ahsan investigates the signs and symptoms of depression - what should we all look out for?

Summary: Michael Mosley and the doctors undertake the most ambitious experiment yet on the series - testing whether the spice turmeric could help protect us against cancer, with the help of nearly 100 volunteers, several UK universities and some brand new technology. Gabriel Weston learns how one of these methods, based on a new understanding of the very beginnings of cancer, could soon provide us all with personalised cancer tests. Dr Chris van Tulleken investigates whether glucosamine pills really help with joint pain, and Dr Saleyha Ahsan looks at whether cheap painkillers are as good as expensive brands. Guest Dr Zoe Williams, meanwhile, tries out home cholesterol test kits.