What function _ does the daily composition of whitening the products all have to whiten

What function _ does the daily composition of whitening the products all have to whiten
Vitamin C: Have another name called the ascorbic acid, resist the oxidation, can reduce the melanin, because it is safe and gentle, used extensively. Whitening the result of vitamin C, there are very great relations with its one's own structure and state, usually vitamin C of Model L whitens the result better, namely anticlockwise C that we said.
Ascorbic sour glucose glucoside: Derivative of vitamin C, because of the unstability of vitamin C, so vitamin C that often appears in the cosmetics mostly exist with derivative shape. Resist the oxidation too while when whiten. Security is very high. Use and limit the upper limit of density in 2%.
Phosphoric acid ester of ascorbic acid magnesium: Abbreviated as MAP, it is by comparatively extensive whitening one of the compositions, security is high, stability is relatively high, are used and limited the upper limit of density probably in 3%.
Niacinamide: Store in the nature in animal's liver, kidney, yeast and rice bran extensively, have very high security, and properties are steady, it is difficult to be or heated and destroys acid, alkali. Lacks the niacinamiding will cause pellagra in the human body. Whiten the composition to use in the cosmetics.
Glucoside of bear fruit: A kind of plant is extracted, the speed of its function is extracted quickly more than some common whitening plants, even cross vitamin C quickly,
Sun is used many of skin care product. Have some irritation to skin, limit the density probably about 7%.
The plant is extracted: The safe and gentle one whitens the composition, usually many kinds of matching together, there is no burden to the skin in long term administration, but the result will be slower. Produce the result by inhibiting the activity of amine enzyme of junket. This kind is extracted and usually had Sang Shan, small cucumber, Sang Bai's cover, Chinese angelica, licorice root, tree peony peel, papaya,etc. by plant utilized extensively.

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