How to Prevent and Reverse Gray Hair
Why Hair Goes Gray
As each strand grows, all hair goes through a cycle of regeneration then death, and the cycle continues again and again throughout the lifespan as long as your hair follicles remain active. (If they flip "off" and go dormant, that's when balding occurs.) As hair follicles encounter stressors and age, they can begin to produce less color each phase. Our genes partially determine when we begin to gray. In fact, the Library of Congress says our chance of going gray, on average, increases 10% to 20% every decade after age 30.