Health guidelines can feel contradictory and hard to interpret. But a new star rating system should help consumers and policymakers better parse the evidence behind health risks and outcomes.

The tropics are projected to face almost daily dangerous heat by 2100. And “extremely dangerous” heat that’s almost unheard of today will occur more often in several regions.

A discovery of what happens inside artery plaque to trigger a stroke could lead to new drug targets to prevent them and also prevent heart attacks.

The first two weeks of preseason training are the toughest as players’ bodies acclimatize to running hard in the heat. An exercise scientist explains the risks.

The first two weeks of preseason training are the toughest as players’ bodies acclimatize to running hard in the heat. An exercise scientist explains the risks.

The first two weeks of preseason training are the toughest as players’ bodies acclimatize to running hard in the heat. An exercise scientist explains the risks.

Because some seizures are relatively subtle, they can go unrecognized, leading to a delay in diagnosis.

A simple procedure using a blood pressure cuff can boost vascular and cardiac function and reduce the risk of heart attack or stroke.

A simple procedure using a blood pressure cuff can boost vascular and cardiac function and reduce the risk of heart attack or stroke.

"Seizures are a common complication of stroke. Screening and treating stroke survivors for them may reduce the onset of dementia."