為什麼去角質也能美白？
帶有黑色素的皮膚細胞跟平常的皮膚細胞一樣，都會慢慢由角質細胞向上移動，逐漸角質化、老化、死亡，形成最上方的角質層，皮膚看起來就會比較深色。這個過程約需要28日。
我們可以用一些磨砂或其他去角質產品加快老化角質層的掉謝，產生美白效果。不過這個方法對於基底層的色素是處理不到的，也不能經常使用，大約一星期一次就足夠了，否則皮膚會變薄，容易敏感。
How exfoliating products help in skin whitening?
Similar to normal skin cells, keratinocytes with melanin slowly move upwards, are gradually cornified and form part of the stratum corneum in every 28 days. Thus the skin darkens.
Skin exfoliants can promote desquamation, the process of cell shredding from the skin surface, which then help in skin whitening. However, this method only deals with pigments on skin surface, not the source from stratum basale.
A little tips - exfoliation should only be done once a week. Otherwise, skin would become thin and sensitive if we exfoliate too often.