Dermatologist Recommended Face Cream Sour Cream Whitening Skin?

Sour Cream Whitening Skin? - dermatologist recommended face cream

Sour cream is the pale face and arms, when used as a mask? If not, how often I need to apply and how quickly does it work? I'm going to a new school, which is a lot of outdoor activities, and I do not get darker. I really want clear skin. And if that fails, what products? "I have asked many dermatologists recommend daily sunscreen --