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. Lamberts® Time Release Vitamin C 1000mg tablets also contain a relevant level of bioflavonoids, the natural compounds that are often associated to vitamin C in fruits and vegetables. Vitamin C contributes to normal collagen formation for the normal function of cartilage, the tough tissue that lines the surfaces of joints. Vitamin C also contributes to the normal function of the immune system and to the protection of cells from oxidative stress caused by ‘free radicals’ Each tablet delivers: Vitamin C (as ascorbic acid) 1000mg Rose Hip 100mg Citrus Bioflavonoid Complex 50mg Tableted with: Cellulose, Hydroxypropyl Methylcellulose, Tablet Coating (Hydroxypropyl Methylcellulose, Glycerin), Stearic Acid, Silicon Dioxide, Magnesium Stearate. Cautions Over 1000mg of Vitamin C may cause mild stomach upset in sensitive individuals.