(STUDYFINDS) — Endorphins are a well-known exercise by-product, the result of hormones being released that can significantly boost one’s mood. Now scientists say exercise also releases another hormone that may protect the brain against Alzheimer’s disease later in life.

Previous research has long shown that regular physical activity improves memory and may reduce the risk of Alzheimer’s, but researchers didn’t understand why. Researchers at Columbia University sought to shed light on the mystery, honing in on a hormone produced by exercise that was only discovered a few years ago.

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