DHC's Sustained Release Vitamin C can efficiently supply 1000 mg of vitamin C per recommended daily intake by dissolving slowly throughout the day constantly maintaining the ideal amount in your body to support your beauty and health.Essential nutrient with an antioxidant function.Key factor in beauty and health.One of the nutrients that should be kept constantly in your body.How to use:4 tablets daily for adult.. Ingredient: Vitamin C, hydroxypropyl methylcellulose, cellulose, calcium stearate, fine silicon dioxide