That retinoids (Vitamin A-like) work (be it isotrotinoine or topical creams) don't have to mean that a vitamin deficiency is the cause. Vitamin A and retinoids

That retinoids (Vitamin A-like) work (be it isotrotinoine or topical creams) don't have to mean that a vitamin deficiency is the cause. Vitamin A and retinoids have very specific effects on skin.