In a major new finding almost a decade in the making, researchers at Harvard Medical School say they’ve found a key that may unlock many of the mysteries of Alzheimer’s disease and brain aging — the humble metal lithium.

FRIDAY, Aug. 8, 2025 (HealthDay News) — Tiny amounts of lithium — a natural metal — may help protect the brain from Alzheimer’s and signs of aging, new research shows. Scientists at Harvard Medical School and Rush University found that when mice were fed a low-lithium diet, their brains developed more inflammation and signs of aging accelerated.

A new study led by Harvard Medical School researchers found that lithium can help the brain resist the ravages of aging and als. Lithium is a metal found in some foods, drinking water, and in trace amounts in our bodies.