Grape seed extract is a pure natural substance and is one of the most potent antioxidants found to date.The test shows that its antioxidant effect is 30 to 50 times that of vitamin C and vitamin E. PAC have strong activity and can inhibit carcinogens in cigarettes. The ability to capture free radicals in the aqueous phase is 2 to 7 times higher than that of general antioxidants, and more than twice as high as α-tocopherol.