Vitamin C is an effective antioxidant that brightens the skin tone and reduces the appearance of signs of aging. Note: Based on recommendation from our customers, this formula is now offered in a tube format for easier dispensing. This product is a water-free suspension of 23% L-Ascorbic Acid powder. Topical Vitamin C offers a wide array of benefits to the skin. However, many forms of Vitamin C and many more formulations of Vitamin C are available commercially with a potential to confuse the audience. 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. If you prefer to avoid this gritty feel, we suggest our Vitamin C Suspension 30% in Silicone. Volume 30ml