Painkiller addiction: the plague that is sweeping the US

Ed Pilkington: Prescription pill overdoses are killing 15,000 Americans a year, and the toll is growing

Ditch the car to walk or cycle short journeys ‘for healthier Britain’

National Institute for Health and Clinical Excellence says 'invisible burden' of inactivity and obesity as harmful as smoking

Aberdeen is the happiest place in Scotland… and that’s no joke

Despite its reputation as a cold, hard and dour city, Aberdeen offers rich culture, low unemployment and an enviable lifestyle

Risky sexual behaviour threatens to derail Aids progress, UN report says

UNAids says HIV drugs are saving lives, but prospects of changing behaviour to stop spread of infection are not promising

Happy teenagers earn more as adults

A study suggests that the happiest people at 16 and 18 earn around 10% more than the average income a decade later

International Men’s Day: the seeds of a new movement

Ally Fogg: Men's issues must be considered alongside those of women, not least because our lives and welfare are intertwined

Hundreds of Irish women forced to come to Britain for abortions

Amid pro-choice rally at Savita Halappanavar's death, activists reveal the rapes and illness forcing women to seek abortions

Making porn actors wear condoms is not the best way to protect us

Stoya: Measure B, a law requiring the use of condoms in adult movies in LA County, fixes a problem that doesn't exist. Our sex is safe

Is China failing its young people on sexual health?

Awareness among China's 161 million 15-24-year-olds is poor, while sex education and services are said to be inadequate. Frederika Whitehead reports

Unanswered questions over death of pregnant woman in Irish hospital

Denis Campbell: Inquiries now under way must establish when doctors should have realised there was a risk to Savita Halappanavar's life