20% Vitamin C Brightening Serum.

"There is a very potent amount of vitamin C in this serum and it releases micro doses of the vitamin C throughout the day. [...] It is 20 vitamin C brightening serum. If you ever see anything above 20 on a vitamin C serum, my suggestion would be to leave it on the shelf where it is and not use it. When you get it above 20, you're really running the risk of extreme irritation on your skin and you do not want to be using anything that's going to cause more irritation when you're just simply trying to improve your skin. There is no clinical data or scientific evidence that anything above 20 is going to yield you more benefit than risk. I do like that it is micro dosed throughout the day because your antioxidant can break down really quickly."