Natrol Easy-C is a high potency antioxidant that contains esterified Vitamin C. Esterified Vitamin C is a dietary supplement formulated to eliminate vitamin C's usual acidity, making it easy-on-the-stomach. Esterified Vitamin C is both water and fat soluble and provides quicker absorption and better retention for superior health benefits. Esterified C is four times more effective than conventional Vitamin C.