WHAT IT IS: 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. The Ordinary's portfolio of Vitamin C includes the following formulations: 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. Refer to our in-depth guide to patch testing. Keep out of reach of children. INGREDIENTS: Ascorbic Acid, Squalane, Isodecyl Neopentanoate, Isononyl Isononanoate, Coconut Alkanes, Ethylene/Propylene/Styrene Copolymer, Ethylhexyl Palmitate, Silica Dimethyl Silylate, Sodium Hyaluronate, Glucomannan, Coco-Caprylate/Caprate, Butylene/Ethylene/Styrene Copolymer, Acrylates/Ethylhexyl Acrylate Crosspolymer, Trihydroxystearin, BHT.