Product Name: Grape Seed Extract Place of Origin: China Active Substances: Oligomeric proanthoyanidins (OPCS) Packing:25KGS/Drum Features: 1) Characters: brown black powder 2) Specification: OPC 95% by UV 3) Functions: antioxidant capacity of grape seed (skin) extract comes from proanthocyanidins (oligomeric proanthocyanidins) (OPCs) with an antioxidant power 20 times stronger than vitamin C and 50 times stronger than vitamin E,OPCs is known as a powerful antioxidant to neutralize free radicals, which play a major role in degenerative diseases, cardiovascular diseases, impaired vision, sun damage and premature aging.