黑素皮质素受体基因变异也可能在深色头发的人群中发生，但几率较小。

The mutation in the MC1R gene also occurs in brunets, although it's less common.

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目前来看，它的作用是上调前列腺素e2(一种帮助头发生长的激素)，同时能够抑制雄激素受体的相关功能，促进和保护了头发毛囊的生长。

Basically what it does is up-regulate PGE2 which AIDS in hair growth, suppresses androgen receptor related functions, promotes maintenance, and significantly improves the functions of hair follicles.

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例如，如果您有刚分娩，有一个很好的变化，你的身体已经被耗尽的维生素需要的良好的头发生产。

For instance, if you have recently given birth, there is a good change that your body has been depleted of the vitamins it needs for good hair production.

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