Michael Mosley investigates the best way to keep calories in check, and Saleyha Ahsan runs an experiment to find out whether probiotic products really can improve health. Show more

Dr Zoe Williams looks at boosting metabolism, Michael Mosley examines the effects of air pollution, and Dr Saleyha Ahsan identifies signs and symptoms of eating disorders. Show more

Michael Mosley and Dr Chris van Tulleken investigate omega-3 supplements, and Dr Zoe Williams discovers why eating a lot of fat affects men and women differently. Show more

BBC News School Report Live - a special broadcast about young people's mental health and well-being with Newsbeat's Tina Daheley and CBBC Newsround's Ricky Boleto. Show more

Dr Chris van Tulleken explores the latest science around HIV, meeting health professionals, scientists, and individuals affected by it in the UK and South Africa. Show more

Angela Rippon and Dr Chris van Tulleken team up with scientists to turn back the clock on a group of volunteers, showing how to reverse the ageing process. Show more

Angela Rippon and Dr Chris van Tulleken investigate the ageing process. An unfit 57-year-old discovers how building muscle could protect her against illness. Show more

Angela Rippon and Dr Chris van Tulleken investigate the ageing process. A woman sees what her diet is doing to her skin, and an ex-policeman scores the worst body age seen so far. Show more

Chris and Xand van Tulleken explore the latest understanding of how we all grow and uncover the reason our childhood is longer than any other creature on Earth. Show more

Chris and Xand van Tulleken look at what keeps the human body alive, including reflexes, damage repair mechanisms and the immune system. Show more

Documentary series. This episode explores how our experiences shape our minds and bodies as we journey from the most helpless to the most sophisticated organism on earth. Show more

Richard E Grant joins Alex Jones and Matt Baker to talk about his award-winning role in Can You Ever Forgive Me. Show more

Clips from Operation Ouch! All about bellybuttons, from how the umbilical cord works when you're a baby, to why some people have outy belly buttons.

Clips from Operation Ouch! Discovering how vocal chords, diaphragm and lungs work to allow you to sing.

Clips from Operation Ouch! Discovering why we have microbes and parasites all over our bodies and how they help us.

Clips from Operation Ouch! Discovering how your nerves work.

Clips from Operation Ouch! Three dogs show us how they can help in medical situations, from diabetes to diagnosing serious illness and during pet therapy.

Clips from Operation Ouch! Investigating how leeches and maggots are used as a medical treatment.

Clips from Operation Ouch! Muscle and tendons work together to make our bodies move - we show you how.

Clips from Operation Ouch! We take a closer look at your tongue and how your taste buds work.