Princeton Vitamin’s grape seed extract-95% (Vitis vinefera) contains the clinically proven and trademarked ENOVITA. ENOVITA has been clinically shown to maintain healthy blood pressure and cardiovascular function. Grape seeds are a by-product of the wine and grape juice industry. Grape seeds are rich in antioxidant compounds, including phenolic acids, anthocyanins, and flavonoids. They are also an excellent source of oligomeric proanthocyanins (OPCs). Scientific studies on grape seed extract have shown that the antioxidant power of proanthocyanidins is 20 times higher than Vitamin D and up to 50 times greater than Vitamin C’s antioxidant values.