年龄在20～34岁的47名(女24,男23)健康志愿者被研究。除5名口服避孕药外,所有受试者采样前停用任何药物4周,1名是孕妇。23名男性受试者均无明显或早期脱发现象。于下午两点半钟分别从头皮额及枕部的一定部位取发样,用显微镜检查确定生长期头发(每个研究部位大体是20根生长期头发),然后用剪刀从拔下的根部向上剪约1cm为试 Forty-seven (24 female, 23 male) healthy volunteers aged 20-34 years were studied. Except for 5 oral contraceptives, all subjects discontinued any medication for 4 weeks before sampling, and 1 was a pregnant woman. Twenty-three male subjects had no obvious or early signs of hair loss. At half past two in the afternoon, respectively, from the scalp and forehead to take a certain part of the sample taken by microscopy to determine the growth of hair (each research area is roughly 20 growing hair), and then use the scissors from the root pulled up Cut about 1cm for the trial