Fast-food study finds calories count for little for most customers
Labelling on food deters only a minority of people from the more fattening choices on the menu, research finds
The NFL star and the brain injuries that destroyed him
Before the former American football player Dave Duerson killed himself, he asked that his brain be left to researchers studying head injuries among athletes. What it revealed shocked the scientists
Sedentary lifestyle can lead to pulmonary embolism, study finds
Survey of 70,000 nurses shows those who choose sofa over exercise after work more likely to get blood clots on lungs
Are we not, like Anthony Weiner, caught in a web of desire?
Daniel Denvir: The hypocrisy over the New York congressman's shame is epic: the reality of online sexual liaison is that almost everyone's at it
Why won’t the pope let women protect themselves from HIV?
Nancy Goldstein: As the UN reviews its HIV/Aids strategy, papal representatives are putting doctrine before African women's health
25,000 Big Macs: burger a day keeps the doctor away (since 1972)
McDonald's restaurant in Wisconsin unfurls banner to mark loyal customer Don Gorske's 25,000th burger
Single payer health: it’s only fair
Bernie Sanders: US healthcare is grossly distorted by waste and profit, while millions go uninsured. Americans deserve full universal coverage
What we’re not being told about Paul Ryan’s Medicare plan
Dean Baker: The mainstream media has failed to report that the Ryan plan is a privatisation programme that will hand $30tn to insurers
Democrats must draw the line on Medicare
Michael Tomasky: Defending Medicare from the Republicans is not just about healthcare, but the future of America itself
What’s the secret of long life?
Open thread: Walter Breuning, who was the world's oldest man, has died aged 114, leaving some tips for longevity. We'd like to hear yours