This week

Gluten-free diets shouldn’t be done by people who don’t have coeliac disease, experts have warned. Only one per cent of Brits are genuinely glutenintolerant – but 12 per cent are thought to have cut it out. Docs say this is lowering their intake of whole grains, which are good for the heart.

A simple £50 blood test could help doctors devise personalised treatments for men with advanced prostate cancer. The test can predict which patients are likely to respond to drugs abiraterone and enzalutamide and who might be better off receiving alternative treatments, says Cancer Research London.

If your knees click as you stand up it could mean you’re at risk of osteoarthritis, says US research.