1, vitamin e: a fat-soluble vitamin with antioxidant function. Among the eight related compounds composed of tocopherol and tocotrienols, α -tocopherol has the same antioxidant effect on cell membrane.
2. Melatonin: A powerful antioxidant. It easily crosses the cell membrane and the blood-brain barrier. Unlike other antioxidants, it does not participate in the redox cycle.
3. Glutathione: A polypeptide containing cysteine, which exists in most aerobic organisms. Because the sulfhydryl group on cysteine is reducible and can be reduced after oxidation, glutathione has antioxidant function.
4. Vitamin C: monosaccharide redox catalyst in plants and animals. Vitamin C is a reducing redox catalyst, which can neutralize active oxygen such as hydrogen peroxide.
5. Uric acid: the highest concentration of antioxidants in the blood. The antioxidant activity of uric acid is very complicated. It can't react with some oxidants such as peroxide, but it can play an antioxidant role in peroxynitrite, peroxide and hypochlorous acid.
Extended data:
1, antioxidant is any substance that can effectively inhibit the oxidation reaction of low-concentration free radicals, and its mechanism of action can be to directly act on free radicals or indirectly consume substances that are easy to produce free radicals to prevent further reactions.
2. Antioxidants in human body are synthesized by themselves and supplied by food. Enzymatic and non-enzymatic antioxidants play an important role in protecting the peroxide damage caused by exercise.
3. Take enough antioxidants, delay the degradation of the body, prevent skin aging, and stay young forever. Antioxidants can be found in natural diet. They are called the three major antioxidants: vitamin E, vitamin C and beta-carotene.
4. Mangosteen, green tea, carrots, pomegranate, etc. It has the functions of strengthening the body's antioxidant defense system, protecting cells from free radicals and promoting metabolism.
References:
Baidu Encyclopedia _ Antioxidant Baidu Encyclopedia _ Antioxidant