Mercury can reduce skin melanin, while mercury ion low prices of raw materials, these advantages make cosmetics without the entrance into the ranks, in order to "help" us fast beauty cream, whitening. But mercury is a toxic heavy metal, although in a week or even a short period of time dilute the skin spots, long-term use may cause contact dermatitis, red rash appears, and may blend into one, and even the formation of blisters, the prognosis Instead, the facial color deepened.