Years of research have found that the benefits of grape seed extract are due to Oligomeric Proanthocyanidins, known as OPCs. But these powerful health promoting nutrients need to be absorbed in order to support good health. Clinical OPC contains a unique French Grape Seed Extract containing only easily absorbable OPCs for maximum benefits.
Clinical OPC features an array of low molecular weight, tannin-free OPCs and unique compounds not found in the pine bark extract.
Many other grape seed extracts include high levels of tannins—OPCs with a high molecular weight, little absorption, and few health benefits.