Re: What is the difference between BHA and AHA?
BHA's are a better option for active acne as it penetrates deeper into the pores and fight acne. AHA's would be an option if you have no active acne and you want to reduce red marks. If you have no acne don't mess with BHA's (salicylic acid) as it can cause breakouts because it brings up all the acne infection to the surface.
I have used both. I personally do not like AHA's, they irritate my skin a lot but many people love them and love the results too. I have used Salicylic acid in the past, not regularly, but to make my skin peel. I would apply it 4 or 5 times each night, letting it dry each time in between, for a total of 4 or 5 nights and i would get a pretty good peel out of it. But then my skin peels easily, maybe not everyone would get this result. I wouldnt use Salicylic acid as part of my regular routine though as it causes breakouts (for me), but using it as ive described, to make skin peel. worked well for me.