我喜欢这种爱学习的同学~   查资料，分析资料，和别人讨论，然后得出自己的结论。

【 在 jinbabawa 的大作中提到: 】
: 又搜了搜，人类用海娜粉来染色已经有5000年的历史，FDA允许用作染发剂，但不可以直接用在皮肤上
: Regulation
: The U.S. FDA has not approved henna for direct application to the skin. It is, however, grandfathered in as a hair dye and can only be imported for that purpose.[38][42] Henna imported into the U.S. that appears to be for use as body art is subject to sei
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FROM 117.10.81.*