Vitamin C 1,000 mg time release tablets are designed to gradually release its content over 6-8 hour period of time. If 1,000mg Vitamin C were released at the same time, body would only use small portion, and rest would be excreted by urine. Citrus bioflavonoids also protect antioxidant, therefore improving the absorption and therapeutic action of Vitamin C. Vitamin C promotes healthy teeth and capillaries, and helps iron absorption. Vitamin C plays a role in collagen formation within connective tissue and it contributes to hemoglobin and red blood cell formation. Vitamin C also seems to boost immune system, reason for which people take Vitamin C when they have cold. This page is not intended to be a comprehensive review of the medicinal ingredient.