NOW Foods Sustained Release C-1000 with Rose Hips provides a potent dosage of this key vitamin in a “time-released” format that provides Vitamin C to the body over a longer period of time. It is blended with Rose Hips, a natural source of Vitamin C and a synergist. Use of Rose Hips avoids the common allergen of citrus. Most time released Vitamin C products add citrus bioflavonoids, which could result in undesirable allergic reactions. NOW's Sustained Release C1000 is superior and different from the other time-released versions in the market today.Ingredients (each tablet contains):Vitamin C (as Ascorbic Acid)....................................................1000 mgRose Hip Powder.....................................................................25 mg(Rosa canina) (Seed) (provides 1.3 % Ascorbic Acid)Non-Medicinal Ingredients: Cellulose, Hydroxypropyl Methylcellulose (vegetable source), Magnesium Stearate (vegetable source), Tablet Coating (vegetable source).Directions: Adult Dosage: Take 1 tablet daily, preferably with meals. This product is designed to gradually release over a 2-hour period.Cautions: Do not use if you are pregnant or breastfeeding.