Doctor behind trial of HIV prevention drug recounts breakthrough moment

Prof Linda-Gail Bekker receives ovation at Aids summit after presenting trial results of ‘miracle’ drug lenacapavir

Discovery of different forms of insomnia could lead to better treatment

Brain scans reveal evidence of five subtypes, raising prospect of tailored approaches to improving sleep

Forget the 5am starts! Night owls like me possess the real secret of success

A new report suggests self-declared night owls tend to have higher cognitive scores. So please can we now ditch the lazy and undisciplined stereotypes, writes Arwa Mahdawi

‘A 30-second walk would exhaust me beyond reason’: Natacha’s life with long Covid

Natacha Gray had an active life, diving, climbing and playing music, before illness left her so tired she would collapse on the way to the couch. She discusses two and a half devastating years – and how she stays optimistic

Stable sperm counts in Denmark cast doubt on ‘spermageddon’ fears

Contrary to other recent research, study finds no evidence of decline – but conclusions disputed by other fertility experts

Mounjaro is second obesity drug to be approved for use in England

Those with BMI of 35 and a comorbidity could be prescribed tirzepatide and Nice says it is more effective than Wegovy

Is omega-3 oil good or bad for us – and does it matter where it is from?

Research shows fish oil may increase risk of people developing a heart condition or stroke

Cash incentives may help men lose weight, research finds

Men with obesity offered incentives and sent healthy-eating tips in Game of Stones trial found to have lost most weight

Healthy lifestyle may offset genetics by 60% and add five years to life, study says

Genetics alone can mean a 21% greater risk of early death, research finds, but people can improve their chances

Wim Hof breathing and cold-exposure method may have benefits, study finds

Adrenaline release thought to dampen inflammation, but experts say method ‘not without risks’