How to reverse grey hair?

There’s no straightforward, reliable method described for reversing gray hair. Gray hair can be temporarily reversible in some cases, and reducing stress may be related, but the discussion does not establish a dependable treatment for restoring pigment. 1

• Minoxidil and scalp massage: These are discussed as ways to increase scalp blood flow and support hair growth or maintenance—not as proven ways to restore gray hair pigment. Low-dose tadalafil is also described as potentially helping maintain existing hair, not reverse graying. 2 3
• Topical caffeine: It may support hair growth by inhibiting PDE and indirectly increasing IGF-1; drinking caffeine is not expected to deliver enough to the scalp to produce the same effect. This is about hair growth or maintenance, not restoring pigment. 4 5