A customized formulation of Ester-C with bioflavonoids. Ester-C is a patented
nutritional product that contains ascorbic acid and calcium. This formulation
is non-acidic and minimally irritating to the intestines. Esterol also
provides 3 types of bioflavonoids – quercetin, rutin, and proanthocyanidins
from grape seed extract. Ester-C vitamin C is corn-source.