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What is CTE?
By Caleb Neal published
Chronic traumatic encephalopathy, or CTE, is a degenerative brain disease linked to repetitive head trauma. Here's how it affects the brain and who is most at risk.

Can you transplant an organ more than once?
By Victoria Atkinson published
"Recycling" an already transplanted organ could help save lives, but the procedure comes with additional risks, physicians say.

How many more calories does muscle burn than fat?
By Kamal Nahas published
There's an idea that larger muscles burn a lot more energy while at rest. But is that true?

How does alcohol cause cancer?
By Clarissa Brincat published
Research suggests that alcohol causes cancer through at least five different mechanisms.

LA wildfires: How can wildfire smoke affect your health?
By Emily Cooke published
Experts lay bare the health effects of breathing in wildfire smoke and the steps that can be taken to reduce one's risk.

Argyria: The rare disease that turns people blue
By Emily Cooke published
Argyria is caused by a buildup of silver in the body, which discolors the skin.

FDA bans red dye No. 3 in food
By Nicoletta Lanese published
The FDA will no longer allow red dye No. 3 in foods or ingested drugs, citing evidence that high doses of the dye can cause cancer in male rats. There is no evidence it's carcinogenic in humans.

Best sports bras for running 2025: Tried and tested
By Alice Ball last updated
Buying guide From Under Armour Infinity High to Lululemon Enlite, these are the sports bras we recommend.
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