A customized formulation of Ester-C with bioflavonoids. Ester-C is a patented nutritional product that contains ascorbic acid and calcium demonstrated to enhance absorption and retention of vitamin C.* This formulation is non-acidic and minimally irritating to the intestines.* Esterol also provides 3 types of bioflavonoids - quercetin rutin and proanthocyanidins.Other products from HerbsPro