Human body, like metals, will gradually oxidize in nature. Metal oxidation is such as iron to yellow rust, copper to patina and so on. The main culprit of human oxidation is not oxygen, but oxygen free radicals, a kind of active gene with unpaired electrons outside the nucleus. This kind of unpaired electron is easy to cause chemical reaction, damage DNA, protein and lipid and other important biological molecules, and then affect the membrane transport process
The natural antioxidant tea polyphenols can effectively inhibit the action of oxygen free radicals, and the life span of fruit flies containing tea polyphenols is significantly prolonged
that the function of various tissues and organs is damaged, leading to aging of the body.