一、普通的洗发液最容易造成头发的损伤，引起发梢分叉、断发、毛表皮脱落等肉眼可见的外部损伤。这是因为头发在水中呈膨胀柔软的状态，增加了头发之间的摩擦机会。因此，在洗发过程中用润滑性强的洗发液，可以抑制头发的膨胀。二、现代医学认为，脱发与毛囊腺衰退萎缩以及皮 First, the ordinary shampoo most likely to cause hair damage, causing hair bifurcation, hair loss, hair loss and other macroscopic external damage visible. This is because the hair is soft and swollen in the water, increasing the chance of friction between the hair. Therefore, it is possible to suppress the expansion of hair by using a highly-lubricated shampoo during shampooing. Second, modern medicine, hair loss and hair follicles recession decline and skin