This is my second bottle of the 15% azelaic acid, and it’s now a permanent part of my routine. It can sometimes take months to notice a difference when integrating a new product, but I saw a noticeable reduction in redness on my cheeks, and almost no more breakouts along my jaw. I think also helped with ingrown hairs in the chin area, which used to turn into red acne type bumps before finally emerging. It’s a nice light emulsion and absorbs very well with no stickiness or grittiness. And I love that I can get a 15% concentration without a prescription or consultation fee. Highly recommend!