Gray Hair: A Visible Clue to the Body’s Stress Defenses

Gray hair may reveal how hair follicles respond to cellular stress: melanocyte stem cells can shift from pigment production to a protective state under genotoxic or oxidative stress, trading color for safety. It’s not a disease predictor, but a visible sign of the body’s defense and aging processes—and while you can’t reverse the underlying biology, a healthy lifestyle can support cellular resilience by reducing oxidative and inflammatory load.