一般人都认为,人到老年头发变白是一种正常的生理现象,而青少年出现白发就不正常了,是未老先衰的标志,其原因是用脑过度。这些看法对不对呢芽科学家研究发现,头发的黑白与毛发中黑色素细胞的多少密切相关,当黑色素细胞颗粒增多时,头发就显得乌黑发亮,否则,头发就会发灰或发白。 Most people think that it is a normal physiological phenomenon that people turn white in their old age. However, it is not normal for adolescents to have white hair. It is a sign of premature aging and the reason is that they use excessive brain. These observations, right? The bud scientist research found that the black and white hair is closely related to the number of melanocytes in the hair. When the number of melanocyte particles increases, the hair appears black and shiny, otherwise, the hair will be gray or white.