Exercise 'risk' for middle aged

Food hormone link to Alzheimer's
High levels of a hormone that controls appetite are linked to a reduced risk of developing Alzheimer's disease, research suggests.

Child cancer heart checks urged
Children who battle and survive cancer are at increased risk of heart problems and must be closely screened, say experts.

Skunk 'is riskier than cannabis'
People who smoke the potent skunk form of cannabis run a far higher risk of psychotic illnesses like schizophrenia, experts suggest.

Sexes' danger reactions 'differ'
Men and women may respond differently to danger, with males more likely to take action, a brain scan study suggests.

Bottling-up anger 'bad for heart'
Men who do not openly express their anger if unfairly treated at work double their risk of a heart attack, researchers say.