I don't know the answer to this. I tend to exfoliate at least 2x a week. I feel that you shouldn't exfoliate everyday, especially if you have sensitive skin. There are different levels of exfoliating, I feel like some are more harsh than others. For example I own an exfoliator from a brand called St. Ives and it is a very light exfoliator, I feel that it isn't harsh and I can use it daily if I wanted to. Whereas my sugar exfoliator is a bit more rough on the skin because of the grains, so I use that 2-3x a week. But I do feel that you should exfoliate more than once a week.
