"I have very sensitive, rosacea-prone skin. Using the Ultra 15% Vitamin C there was no stinging or irritation, which is usually the case anytime I use Vitamin C serums. I also felt an immediate tightening of my skin after applying the Ultra 15%. I paired the Ultra 15% with the B5 Hydration. It is fantastic! I saw almost immediate improvement in my fine lines and my skin just looked smoother overall. In addition to having rosacea-prone skin, it is also on the oily side, and this product really helped to mattify and equalize the oil content in my skin. I love that it is unscented as well. Overall, this line tops any other Vitamin C products we have ever tried. We are in love with this new line." -Sylvia Babbitt, Dermatology Associates www.dermsa.com