It is now known that the aging of the human body and the occurrence of many chronic diseases and tumors are related to the increased oxidation reaction in the body. In short, aging and many diseases are caused by oxidation.

　　In the body, it is the free radical that plays this “oxidation” role. Free radicals are actually by-products of the body''s energy metabolism. Life activities are inseparable from energy, and energy production is inseparable from oxidation. According to estimates, under normal physiological conditions, 1% to 2% of the oxygen inhaled and used by the human body will be converted into free radicals (the vast majority of the rest are used for normal metabolism). Free radicals show harmful oxidation.

　　Some phytochemicals in food have anti-oxidation effects-destroy free radicals in the body. These phytochemicals play a role in resisting oxidation and ultraviolet damage in plants. Common main ones are:

　　 carotenoids, such as β-carotene, lycopene, lutein, zeaxanthin, etc. They mainly come from dark vegetables and fruits.

　　Vitamin C comes from fresh vegetables and fruits.

　　Vitamin E comes from nuts and oils.

　　Polyphenols (flavonoids), such as tea polyphenols (tea leaves), apple polyphenols (apples), proanthocyanidins (grape seeds), resveratrol (grape peel), soy isoflavones (soybeans) ), Quercetin (onions and other vegetables).

　　 polysaccharides, such as black fungus polysaccharides (fungus), lentinan (shiitake), brown algae polysaccharides (kelp, laver, wakame, etc.)

　　 chlorophyll, derived from green leafy vegetables .

　　 In fact, in addition to the above-mentioned more researched ingredients, there are many antioxidative substances in plant foods. It is estimated that there are thousands of species. Therefore, it is the fundamental measure to increase the plant-based intake of vegetables, fruits, beans, whole grains, nuts, etc. in the diet. The great benefits of these plant-based foods have been proven by many evidence-based medicines.

　　Here, I list (it is also recommended) 10 foods containing more antioxidants: tea, soybeans and their products, tomatoes, green leafy vegetables, citrus fruits, red wine, onions, blueberries , Apples and broccoli (green cauliflower).

　　It should be noted that the main body responsible for the elimination of free radicals in the body is not these antioxidants, but specialized enzymes, such as SOD, glutathione peroxidation Enzyme (GPX), catalase, etc. However, no matter how many products are sold, such as SOD, oral, skin application of these enzymes (its nature is protein) are ineffective. In addition, although the trace element selenium is an auxiliary component that constitutes GPX, selenium supplementation (oral or injection) does not enhance GPX activity without selenium deficiency.