These formulas are designed to maximize absorption and utilization of this essential vitamin. Vitamin C in DaVinci Poten-C® is in the buffered Ascorbate form which helps to prevent stomach irritation that is common when supplementing with plain ascorbic acid found in many over the counter Vitamin C supplements. These formulas also contain minerals and bioflavonoids that help increase the effectiveness of Vitamin C by 50%. Available in 500 mg Vegetarian Capsule and 1000 mg Vegetarian Tablet