This week

Having a 90-minute liein could help you lose weight and eat better, says a study at King’s College London. Those who got more sleep chose healthier food within a week, eating 10 grams less sugar each day.

A genetic test has been developed that could tell men about their risk of developing prostate cancer and at what age. The assessment only needs to be done once and at any age.

Exercising and losing weight could be more effective in managing Type 2 diabetes than drugs. A University of Glasgow study found that patients who took part in cheap weight-loss programmes needed weaker medication than other sufferers, and blood sugar levels were better.