There are a variety of whitening creams on the market, and the various ingredients are dizzying, but which ingredients work best for us? This time we look at whitening ingredients -- arbutin, vitamin C and niacinamide -- that pop up on the ingredient lists of big-name products.
Vitamin C whitening: inhibit melanin whitening, good effect; vc is unstable and easily decomposed by oxidation, affecting the effect.
Niacinamide whitening: inhibit melanin shallow shift, all-round skin care ingredients; Niacinamide has certain irritation, use attention to avoid skin intolerance.
Arbutin whitening: safe, stable and effective whitening, can lighten the stain; Do not use with acidic products.
Conclusion: The three whitening ingredients each has advantages and disadvantages, choose the right ingredients, choose the right concentration, use together, whitening effect is better.
Arbutin
Arbutin is often used in cosmetics (skin care products) as a whitening ingredient. Shiseido in Japan began to use arbutin as a whitening skin care product, and Winona and other domestic brands used it. Arbutin can be divided into α type and β type according to different molecular formula, both have whitening effect:
Exhaustive studies have shown that skincare products supplemented with alpha-arbutin are 10 times more effective in whitening skin than traditional β-arbutin.
Whitening principle:
Arbutin mainly blocks the production of melanin by inhibiting the activity of tyrosinase (an important enzyme in the production of melanin), so as to achieve the role of whitening skin.
Whitening defect:
Arbutin has photosensitivity, so the use of concentration should be careful not to exceed the standard.
In acidic conditions, arbudin will decompose and produce harmful substances, so avoid using them together with vc, salicylic acid, fruit acid and the like.
Vitamin C
Vitamin C for whitening history is not short, vitamin C is also known as ascorbic acid, because of its Antioxidant capacity is particularly strong, leading to its instability, easy to break down. So the ones that are more commonly used today are its derivatives. You add an inert group to the active group to make it more stable. For example: vitamin C derivatives - ascorbic acid glucoside (AA2G), now on the market whitening products, or more or less will add vitamin C or its derivatives.
Whitening principle:
The whitening effect of vitamin C is mainly due to its strong antioxidant capacity. Can be the synthesis of melanin intermediate substance dopa quinone reduction to dopamine, blocking the oxidation chain of melanin production, thus inhibiting the formation of melanin, with whitening effect.
Whitening defect:
Poor stability, easy oxidation and decomposition after sunlight. Vitamin C whitening products are used at night, not to bar daytime use, trouble to do a good job of sunscreen.
Niacinamide
Niacinamide in recent years, the wind is very big, the reason why niacinamide so hot, and it can be verified by the experiment has a variety of effects.
Whitening mechanism:
It blocks the diffusion of melanin to keratinocytes in the epidermis. Most other whitening ingredients work by inhibiting tyrosinase and reducing the production of melanin. Many experiments have also proved that niacinamide and tyrosinase inhibitors do have a synergistic effect, so it can achieve better whitening effect.
Whitening defect:
Relatively speaking, niacinamide has a certain irritation to the skin, some people will be intolerant to niacinamide, after the use of the skin is easy to flush, dry, burst skin, tight, burst acne.
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