IIdon't usually have a lot of acne but when i do i use acne creams and they almost always solve it.... skin is a very subjective matter though. If she has a lot of acne issues i would recommend a medical cream for inflamations, allergies and such, it solves my most bitchy ones
Actually, they do technically make acne worse. They strip your face from all the oils instead of just cleaning your face, so your skin doubles the oil production and makes your pores clog more from it.
Unless you get proper things from dermatologists, they probably aren't doing good for you. Pumped full of mild salicylic acids which just strip your face, clearing it for 2 days then fucking it up again after
I can't say anything about how it tastes though