Product name: grape seed p.E. Original plant: seeds of vitis vinifera l Specification: 95%, 98% polyphenol, 95%, 98% proanthocyanidin Test method: uv Molecular formula: c30h26o12 Molecular weight: 578.53 Cas no. : 84929-27-1 Solubility: partly soluble in water. Pharmacology action: Suggested usage: 1. Prevent skin aging and inhibites uv radiation 2. Enhance capillary strength and vascular function 3. Penetrate the blood-brain barrier to help protection of the brain and nerve tissue from oxidation 4. Alleviate pms problems, brusing, edema from injury or trauma, varicose veins, leg swelling and retinopathy. Changsha kamer essence&flavor co.,  ltd,  a high-tech manufacturer combining with scientific research,  production,  and marketing,  specializes in producing fragrance materials and plant extract.