Vitamin C can help the skin against UV rays, avoid dark spots, freckles produce. Summer can prevent skin damage after sun exposure, promote metabolism, so that the formation of melanin discharge, fade spots. To the fall and winter, it can change the dull skin due to blood circulation variation phenomenon emerged. Melanoma cells convert tyrosine under the action of vitamin C is dopaquinone then oxidized form eumelanin, with the formation of melanin skin normal metabolism gradually reach the surface of the skin, and aging of the skin along with the last natural peeling.