维生素a酸,维生素甲酸又叫视黄酸,维甲酸
维他命 a 酸 具有去角质、促进代谢、调理油脂分泌的功能,可以改善、治疗青春痘、粉刺
用它可以封闭部分毛孔,而且它能把表面的死皮去掉,新长的皮肤细腻。。
这是它的英文说明:
How does Vitamin A Acid work? What will it do for me?
Tretinoin(vitamin A acid) is used to treat certain types of acne. Tretinoin helps acne by causing the skin's outer layer to grow more quickly and be replaced with new skin cells, which helps to reduce the formation of blackheads, whiteheads, and other acne lesions. It may take up to 2 to 4 weeks to see improvement in your acne and the full effect of this medication may not be seen until 6 to 12 weeks.