Premature Graying: Reasons, Options - WebMD Whatever you call it, gray hair happens to all of us at some point. ... Hair goes gray when color-producing cells stop producing pigment, says Jeffrey Benabio, MD ...
「如何預防白髮」的新聞搜尋結果 随着科技的发展，社会的进步，人们的压力也是越来越大，经常会看见很多人因为发愁而白了头发。
