English-Chinese/Europeans often begin to grow gray hairs in their mid-30s

Europeans often begin to grow gray hairs in their mid-30s while Asians begin graying in their late 30s, but most Africans retain their original hair color until their mid-40s.

欧洲人经常在30多岁时开始长出白发，而亚洲人在30多岁时开始变灰，但大多数非洲人保持原有的发色，直到40多岁.