Pharmacological efficacy: Proanthocyanidin (grape seed extract) is a new type of high-efficiency antioxidant, the most powerful free radical scavenger discovered so far, and has very strong in vivo activity. For improving blood circulation, treating diabetic Chemicalbook retinopathy, reducing edema and inhibiting varicose veins, etc., preventing complications after cataract surgery in diabetic patients, eliminating edema and moisturizing the skin. The combination of anthocyanins and vitamin C can break down cholesterol, act as a cardioprotective agent, and more.