Can we eat the same food and still lose weight? In a world first, Dr Chris van Tulleken discovers how to make some of our favourite meals healthier without changing a single ingredient. Medical journalist Michael Mosley finds out why getting more sun on our skin can actually be good for us. Surgeon Gabriel Weston travels to the US to witness a remarkable surgical procedure that's helping the paralysed to regain movement. Also, GPs can prescribe acupuncture on the NHS but does it work? Dr Salehya Ahsan looks at the evidence for this controversial treatment.

Does caffeine really help us to stay alert and what are the alternatives? In this programme some surprising ways to boost our brains are put to the test. Also medical journalist Michael Mosley examines the growing trend for electronic cigarettes and asks if they are safe. Dr Chris van Tulleken investigates if household chores can count as exercise. Dr Saleyha Ahsan gives first-aid tips on how to treat someone suffering from hypothermia and surgeon Gabriel Weston sees life-saving surgery that involves removing all the blood from a patient's body.