After absorption, magnesium phosphate of vitamin C is rapidly hydrolyzed by phosphatase to produce vitamin C. Therefore, it has all the effects of vitamin C. at the same time, it overcomes the shortcomings of vitamin C's fear of light, heat and metal ions. As a water-soluble cosmetic whitening additive, vitamin C magnesium phosphate can effectively resist the invasion of ultraviolet rays, capture oxygen free radicals, promote the formation of collagen, prevent pigmentation, dilute various skin spots, and make the skin moist, white, tender and smooth. Vitamin C magnesium phosphate has synergistic effect with vitamin E.