Salicylic Acid has always been an effective treatment for my adult acne and I was pleased to find a product that not only has .75% SA, but also has some natural ingredients that help control acne, like white tea  leaf extract and lemon juice. It also contains aloe juice which is good for calming skin.  This serum won't make existing blemishes disappear overnight, but does aid in preventing blemishes and keeping current ones under control.  It has been fairly gentle on my skin and doesn't over-dry with normal use.  I'm only using it on current blemishes and blemish-prone areas and am happy with the results so far.