This is one of the few hylaronic acid products that actually works. It is a delightfully light, yet effective moisturizing serum that soaks in immediately, leaving my skin soft and supple. I have acne-prone skin, which of course still needs moisture, and this performs very well without causing ANY breakouts. Exceeded my expectations as have the many other PCA products I use. This is an EXCELLENT cosmeceutical line and I'm sticking with it...