The fact is that girls of any age are keen to make themselves white. The so-called: a white cover a hundred ugly!
A cruel fact: if you don't take care of your skin, it may get darker and darker over time.
The main causes of skin blackening are ultraviolet rays and skin aging.
I believe many girls will choose various whitening products. However, which ingredients are the real whitening ingredients?
The role of hydroquinone is to help inhibit melanin, and it is also considered to be the most effective component to reduce and eliminate pigmentation. Generally speaking, the concentration of hydroquinone in skin care products is 0.5%-2%.
Most studies show that vitamin A (an alcohol) or various A-acid prescription products are very effective for skin spots.
Some dermatologists have suggested that skin care products containing A acid will have an impact on the development of the fetus. Therefore, some opinions suggest not to use whitening products during pregnancy.
But the fact is that A-acid products are generally used in dermatologists' specialized drugs, and A-acid ingredients are not used in normal skin care products. Therefore, there is no skin care product specifically for pregnant women, and normal skin care products will do.
The concentration of fruit acid is 4%- 10% and salicylic acid is between 1%-2%, which is the most effective. Fruit acid and salicylic acid can not only accelerate the cell metabolism of the outer skin, but also directly inhibit the formation of melanin. Therefore, many facial makeup or toning water also contains fruit acid and salicylic acid.
Most dry skin, especially sensitive skin, will change color due to acid. In fact, choosing the right concentration of products will not only cause skin sensitivity, but also help the skin to waste keratin metabolism and inhibit melanin production.
The concentration of rhododendron acid used in skin care products is generally 15%-20%. Generally speaking, azalea acid is very effective in treating skin acne and pigmentation. At the same time, the effect of azalea acid combined with alcohol A, fruit acid and other components will be better.
Speaking of arbutin, everyone is familiar with it. Most whitening products contain arbutin. In fact, arbutin is also a derivative of hydroquinone, which has the effect of inhibiting melanin.
But there is an important problem: there is no report about the whitening effect of arbutin concentration at present. That is to say, although arbutin is used in the product, we don't know whether it has whitening effect.
This is why arbutin is the most common ingredient in whitening products.
Vitamin C, as an effective skin antioxidant, also has the effect of inhibiting skin melanin production. At the same time, there are many forms of vitamin C. Such as: fat-soluble vitamin C, levovitamin C, ascorbic acid C, glucose ascorbic acid, etc. For example, SK2 bulb contains ascorbic acid glucoside.
Nicotinamide is a very popular whitening ingredient in recent years. Nicotinamide is a patented product of Procter & Gamble Group. For example, the light-sensitive white bottle of Olay and the whitening products of SK2 bulb group all contain nicotinamide.
Nicotinamide generally works when the concentration is greater than 2%, but at least 3% is needed to achieve whitening effect. However, nicotinamide is intolerant to some people, and it is easy to cause redness and tingling.
In addition, nicotinamide will be hydrolyzed into nicotinic acid in solution with PH less than 6, which will be more irritating. Therefore, it is not recommended to use nicotinamide products with acid-containing skin care products.
Skin care products with whitening effect are basically the above categories. It should be noted that the whitening ingredients of most skin care products can not be achieved by just one ingredient.
At the same time, different brands of products may have similar ingredients from the product ingredient list, but there will still be differences in concentration and composition. Therefore, we can't judge the quality of products only by ingredients.