Our daily requirement for vitamin C is higher than for any other water soluble vitamin. Ideally, vitamin C needs to be taken in small amounts throughout the day and night because it is rapidly lost from the body. These tablets are specially formulated to release the vitamin C gradually over 6-8 hours after swallowing, which means that the absorption of vitamin C into the bloodstream also occurs gradually. This is believed to create a more stable level of vitamin C in the blood for a longer period. Ingredients - One tablet provides: Vitamin C 500mg Citrus Bioflavonoids 50mg Rose Hip Powder 25mg IngredientsTableted with: DiCalcium Phosphate,Cellulose, Tablet Coating (Hydroxypropyl Methylcellulose, Glycerin), Silicon Dioxide, Magnesium Stearate, Stearic Acid.Directions1 to 2 tablets 3 times daily with a meal.CAUTION: May cause mild stomach upset in sensitive individuals.