I recall reading a few things in the book about which acids were good and which ones were bad for oily sensitive skin. I think it stated that any fruit acids, such as lactic, hydroxy, etc was good for the skin, but that the salicyclic and another kind was too much for the skin. I am so confused, i thin because i am borderline D/O SPW i have read both chapters and I am confusing the products now. Could someone please clarify for me if possible which ones i can use. Thanks