It contains all 4 forms of vitamin C including 15% L-ascorbic acid, Tetrahexyldecyl ascorbate, 3-glyceryl ascorbate, and magnesium ascorbyl phosphate. MDAIRE technology provides an innovative proprietary formulation to deliver maximum absorption and stabilization. Vitamin C is a highly unstable molecule. Therefore the delivery mechanisms and stability of the product become very important. Our unique formulation ensures effective delivery of Vitamin C to exactly where it needs to go in a formulation which allows it to remain molecularly stable and bioavailable once it gets there. The integrity of this innovative blend of Vitamin C is protected in an airless pump to minimize oxidation of the product which can occur if the product is exposed to air. Once applied to the skin, you will notice instantly how fast the product gets absorbed into the skin. It does not pill under sunscreen or make up. **Safe for pregnancy