2. The advantage of weak acid is that it will peel off some cuticles, but the effect is very weak. The direct result is a slight barrier repair, oil control to increase smoothness, and a slight whitening, the effect is very weak.
And some people are naturally allergic to dichotomous mothers, but whoever uses this ingredient is allergic. For example, Lancome black bottle is allergic after being used twice, and then some skin becomes wrinkled and wrinkled. I stopped using it for two days and started to get better. After one week, I recovered completely. Then I stopped using it and continued to use it. Then I confirmed that the allergen was this one, and then other brands were allergic to this brand. If I'm not sure to keep using it, it may really ruin my face.