Disclaimer: I am not a doctor, just a cartoon deer on the internet with a background in chemistry and a hyperfixation on skin. This is not medical advice.
Adapalene 0.1% is hands-down my favorite OTC acne treatment.
There are many ingredients that work well for acne, including but not limited to:
Salicylic acid
Benzoyl peroxide
Azelaic acid
Mandelic acid
While these are great, nothing has made me (and my clients!) glow like adapalene has.
In fact, I cleared up Kate's face (among many others) using adapalene 0.1%:
So, let's talk about the good, the bad, and the not ugly (aka I'll explain how to use it safely so you don't burn your face off).