Azelaic Acid.

"The Inky List has a 10% azelaic acid option. Azelaic acid is an ingredient that is calming and soothing, great for those that have sensitive skin. If you have redness, rosacea, azelaic acid is usually prescribed to those that have rosacea. And this is also another ingredient that is great for acne prone skin as well. I have been using azelaic acid all summer long, actually started late spring and I've been using it ever since in both my morning and nighttime skincare routines because this has really helped to keep my skin clear. Do I still break out with azelaic acid? Yes, I do. Not as much though. This really cuts down on the breakouts, but it just keeps my skin so soft and it gives a brighter complexion. There is a mild mild exfoliation with azelaic acid, but it's not meant for exfoliation. This just has a mild exfoliation, but it's very calming and soothing. And I absolutely love this."