Naka's Time Release, 1000mg, Vitamin C provides you with all the health benefits of Vitamin C and the added benefits of Rose Hips & Citrus Bioflavonoids. According to the American Botanical Council, Rose Hips is known for its therapeutical uses in the treatment of stomach colds and convulsive cough. Citrus Bioflavonoids, natural substances found in the peels of citrus fruits, possess the properties of a vitamin and are referred to as Vitamin P. They are used as a remedy to help aid colds/flus and to protect against viral infections.