This formula is designed to maximize absorption and utilization of this essential vitamin. Vitamin C in Unique C 1000 is in the buffered Ascorbate form which helps to relieve stomach irritation that is common when supplementing with plain Ascorbic acid found in many over the counter Vitamin C supplements. This formula also contains minerals and bioflavonoids that help increase the effectiveness of Vitamin C by 50%.Other products from HerbsPro