Environmental pollution, cigarette smoke, chemical insecticides herbicides, ultraviolet, especially blue light that we frequently exposed through television, the Smartphone screen ... is the risk factor of formation of free radicals, which cause degeneration of the yellow point. Free radicals are atoms or molecules missing one electron outer layer. They act as oxidizing, electronic capture of the molecules, atoms to establish sustainable status for themselves. The molecules, atoms is takes electronics, continue to repeat this process re.
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