A Water-Free, Silicone-Free Stable Suspension Vitamin C is an effective antioxidant that brightens the skin tone and reduces the appearance of signs of aging. Note: The format of this formula is a suspension of very fine L-Ascorbic Acid powder and, as such, provides the most direct exposure of extremely high concentrations of Vitamin C topically. With such format, there are 2 important things to consider: 1) A very strong tingling but non-irritating sensation is expected during the first 1-2 weeks of use until the skin's tolerance to such high exposure is elevated. If the sensation is too strong to tolerate, the formula can be mixed on each application with other creams or serums of your preference. 2) The powder exposure to the skin disallows the formula to feel like a serum, lotion or cream and each application requires a few seconds to feel absorbed by the skin. This formula feels gritty for a few seconds after application. Free of: water, alcohol, oil, silicone, nut, gluten; Vegan and cruelty-free How to use Apply a small amount to face in the AM or the PM (PM preferred). Avoid contact with the eyes. A tingling sensation can be expected after application. If the sensation is too strong to tolerate, the formula can be mixed on each application with other creams or serums of your preference. If irritation occurs, cease use and consult a physician. Use only as directed on unbroken skin. Patch testing prior to use is advised. Keep out of reach of children