Why some people escape Alzheimer’s despite carrying a high-risk gene

What the research found

Scientists have discovered why some people with a high genetic risk of Alzheimer’s remain mentally sharp into their 80s, uncovering a rare mutation that protects the brain from harmful protein buildup. The findings reveal a potential new way to prevent early brain damage and could pave the way for treatments that mimic this natural defense.

Evidence level: Human study. A study in people, but an association isn't proof of cause.

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