Source: Nikki ingredient WeChat official account
Original title: is nicotinamide, the top stream in skin care industry, really white?
They all said, \
Whether you are male or female, or not, the overwhelming publicity of major brands will make you firmly remember it, because its frequency is too high, almost everywhere.
It’s for the face
It’s for you
Even facial cleanser, shower gel also has its shadow
It seems that no matter what the product, as long as there is nicotinamide, the \
So is it really a \
Nicotinamide is actually the general name of nicotinic acid (vitamin B3) derivatives, which is a kind of water-soluble, stable small molecular weight substance~
In the earlier literature, it was called vitamin PP, which was mainly used to prevent pellagra. It was only in recent years that it was promoted to the altar. The road to fame of nicotinamide is closely related to P & G company~
Its emergence can be traced back to 2002, when P & G published the effect of niacinamide on reducing cutineous segmentation and suppression of melanosome transfer. This paper demonstrates in detail how nicotinamide can achieve the whitening effect by blocking the transfer of melanosomes to keratinocytes. From then on, nicotinamide was completely labeled as \
Whitening \/ brightening
The whitening principle of nicotinamide is to block the transport of melanin by inhibiting the production of tyrosinase, so as to achieve the purpose of whitening~
Another point is that nicotinamide also has the effect of accelerating the exfoliation of the cuticle (that is, we often say exfoliation), further enhancing the whitening effect. However, the exfoliating effect of nicotinamide is much milder than that of acids such as salicylic acid, which is one of the reasons why it is so popular~
And its whitening effect can be seen at 2% concentration, which is quite friendly for sisters with relatively sensitive and intolerable skin~
Cr: Taobao Olay official flag
The claim that nicotinamide can control oil comes from a study by draelos et al. They conducted clinical trials on yellow and white people respectively, and found that after topical use of 2% nicotinamide for 2 weeks and 4 weeks, the sebum excretion rate of yellow people decreased significantly. 2. Therefore, there is the claim that nicotinamide can control oil.
However, this is insignificant in the face of whitening, the \
Cr: official flag of Taobao deciem
Its repairing effect also starts from ceramide, our old acquaintance. Ceramide is more like a \
That is to say: the higher the ceramide content in the skin, the stronger the skin barrier, the higher the moisturizing power, and it is not easy to get old~
One of the ways to produce ceramide is catalysed by ceramide synthetase, and nicotinamide can enhance the activity of this synthetase, so as to achieve the effect of repairing skin barrier ~ so you will see some products with nicotinamide as the main repairing effect, but the price is…. You know~
Cr: Taobao xiulikengqi
As the saying goes, \
The higher the concentration of nicotinamide, the better?
No. The choice of nicotinamide concentration depends on your skin needs.
If you just want to moisturize and repair the skin barrier, 2% nicotinamide is enough. If you want to brighten the skin, it is recommended to choose more than 3% of the concentration of the product in order to see the effect.
And more than 5% nicotinamide has a certain degree of irritation, need to be steady before trying to establish a good tolerance, and then face use~
Does nicotinamide cause hair?
Not really. If it was true, KK would have painted it all over his head. Then why do some people always come up with their own story and say that they have grown strange after using it?
It has been said that nicotinic acid is the predecessor of nicotinamide, but it was found that nicotinic acid has a certain hair generating effect in a previous experiment on female hair loss. This is because nicotinic acid has a certain effect of dilating blood vessels.
But its \
Nicotinamide has completed its mission of whitening. After brightening the complexion, the hair will be blacker and coarser.
The purity of nicotinamide used in the product is not enough, and a certain proportion of nicotinic acid is mixed in, resulting in slight hairiness.
So sisters don’t have to
Worry, give nicotinamide a little trust
Does male nicotinamide turn black when used up?
Unfortunately, I will tell you. In 2005, scientists from P & G Japan and P & G America jointly published an in vitro study in ED, which confirmed that the process of nicotinamide inhibiting melanin transfer is reversible. That is to say, after stopping the use of nicotinamide products, the skin will slowly return to its original color, which is often called \
However, it is different from hormones in that it is hormone dependent and the symptoms will be more serious after discontinuation; Nicotinamide does not belong to hormone class, so it has no dependence. The so-called \
In a word: if you want to become a white fairy, there is no shortcut once and for all. Comrades, persistence is victory
All right, Balabala said so much, do you know more about nicotinamide?