I've tried pretty much everything out there. Even products especially made for ingrown hairs and razor burn won't contain anywhere near a 10% concentration of glycolic acid. Even the expensive high end stuff from Sephora doesn't compare to this new stuff from Acne.org Dan's AHA is the best 10% concentration product I have used to date. Very little stinging and irratation compared to products like Gly-Derm. Goes on smooth, and moisturizes great. My wife loves it as well. All of Dan's line is ex