Trials have shown that rates of HIV infection are reduced if people not infected with HIV take anti-retrovirals - known as pre-exposure prophylaxis (PrEP). But adherence to a daily dose is a problem.
It may not be burgers for breakfast, but the diets that have launched some big online careers aren't as healthy as you might think.
Chemicals that form in cooked food have been linked to cancer – but the full picture is more complicated.
New data suggests humans may not get older than 125 years. But should we take it seriously? Every time a limit to lifespan has been proposed in the past it has been surpassed.
A lack of sleep is a problem for children with ADHD and their parents. New research has an uplifting message for both.