... Proanthocyanidins 99% 95% -Polyphenols 95% 90% 85% Proanthocyanidin (PA or PAC), also known as procyanidin, oligomeric proanthocyanidin (OPC), leukocyanidin, ... Molecular Weight:578(Dimer)Specifications:Proanthocyanidins: 95% min ( UV, Beta-smith)Polyphenols: 70-95% (UV, Folin-Ciocateau)OPCs: 30-85% ... N.W.: 25kg/drumJianhe Biotech's ORAC Grape seed P.E is extracted via purified water, which can keep ...