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Explained

Could getting rid of old cells turn back the clock on aging?

Researchers are investigating medicines that selectively kill decrepit cells to promote healthy aging — but more work is needed before declaring them a fountain of youth

Amyloidosis: Beyond Alzheimer’s and Parkinson’s

Amyloid plaque can build up in body organs other than the brain. The resulting diseases — AL amyloidosis, ATTR amyloidosis and more — cause much suffering.

Sex, immunity and the brain

Differences between the immune systems of males and females — in particular, ones involving cells called microglia — might help explain why the risk for conditions such as autism and Alzheimer’s varies between the sexes

Why a diabetes drug fell short of anticancer hopes

Population and animal studies suggested it could treat cancer, but the clinical trials were a bust. Here’s what happened and what potential may remain.

All about cholesterol

The latest science on how blood levels of HDL, LDL and more relate to cardiovascular health

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