Many of the antioxidant ingredients used in cosmetics are inherent in the human body and are a member of the human body's antioxidant mechanism, such as vitamin C, vitamin E, SOD (superoxide dismutase), glutathione and coenzyme Q10, etc. . In addition to these basic classic antioxidants, there are some ingredients that, although not part of the body's own antioxidant system, have also been shown to have good free radical-fighting effects. For example, plant extracts - plant polyphenols, resveratrol and Pycnogenol, which has been a hot topic in recent years; synthetic antioxidants - EUK-134 and LIPOCHROMAN; in addition, ergothioneine, astaxanthin and fullerenes, although Expensive, but also increasingly valued. In addition, although ingredients such as niacinamide are not directly involved in fighting free radicals, they also have a certain effect on antioxidants because they participate in the synthesis of antioxidant components in the human body.