Niacinamide due to a certain degree of self-efficacy, prompting foreign major brands have successively launched a series of nicotinamide products, the main attack on the Asian market, a moment of whitening effect of niacinamide instantly caused a burst of niacinamide fever in the domestic market, so far the aftertaste has not disappeared. But do you really understand niacinamide? Is its whitening effect really so magical? Today Sissy took you into niacinamide to really understand niacinamide.
<h1 class="pgc-h-arrow-right" data-track="3" >. What is the beauty and skin care effect of niacinamide? </h1>
Niacinamide is a water-soluble vitamin B3 that is the bioactive form of niacin found in a variety of plants. It promotes biological oxidation processes and tissue metabolism and plays an important role in maintaining the integrity of normal tissues, especially the skin, digestive tract and nervous system. It can activate melanocytes, thereby inhibiting tyrosinase activity and cell proliferation, affecting skin pigmentation, reducing the content of melanin in the human body, accelerating the metabolism of melanin keratinocytes, interfering with the "communication" between melanin and keratinocytes, effectively reducing the production of melanin, and has a certain effect on the treatment of pigmentation caused by melasma and ultraviolet rays, with certain anti-aging and whitening effects. Legend has it that skin care cosmetics containing niacinamide are used, and the change in the color of the facial spots can be seen with the naked eye.
Niacinamide is made of β-methylpyridine by air oxidation of the component niacin, the latter with ammonium hydroxide action, reheating dehydration to separate the crystallization, and washed with ethanol, dried into a white crystalline powder, easily soluble in water or ethanol. Because niacinamide has inhibited tyrosinase activity and cell hyperplasia, affected skin pigmentation, and reduced the melanin content of the human body, it is widely used as a whitening additive ingredient of skin care products to play an anti-aging and whitening effect.
<h1 class="pgc-h-arrow-right" data-track="6" > second, everything has pros and cons, and niacinamide also has its shortcomings</h1>
As mentioned earlier, niacinamide is a crystalline powder that is separated by the action of niacin and ammonium hydroxide, reheated and dehydrated, and washed with ethanol and dried to produce a white crystalline powder. Niacin has a strong role in dilating human blood vessels, so it will cause skin irritation, and some consumers may cause redness allergy when using products with high content of niacinamide, which is often said to be niacinamide intolerance. Therefore, the addition control of niacinamide ingredients in cosmetics is very exquisite, and different formula designs and processes have different effects on skin care results. Generally, the addition of niacinamide ingredients to skin care products must be controlled at 5%-7/or less, otherwise there will be adverse reactions. However, many bad manufacturers in order to enhance their whitening effect, and cause many side effects, causing damage to the skin.
<h1 class="pgc-h-arrow-right" data-track="8" > third, what are the side effects of improper use of niacinamide skin care products</h1>
If you have sensitive skin, or dry skin, when the sebaceous membrane is not sound or the skin is not well tolerated, the irritation of niacinamide itself is likely to lead to redness and allergy, itching in the corresponding position of the skin, rash, and even... Swollen up. Extremely rare is to cause kidney function damage uric acid is high, but also prone to arrhythmias, tachycardia and other conditions. Overuse can also lead to digestive and absorption disorders, epigastric pain, nausea and vomiting, and even manifestations of hyperglycemia.
<h1 class="pgc-h-arrow-right" data-track="10" >4. Be careful when using niacinamide products</h1>
1. The skin must be tested before use: before using niacinamide, use it on the back of the hand or behind the ear to try it, there is no redness, allergy or tingling, and then use it on the face.
2. Stop using immediately if there is no redness or tingling sensation after testing: if there is no redness allergy or tingling sensation after testing, it can be used, but when there is skin flushing and itching, or hyperglycemia, hyperuric acid, arrhythmia, dizziness, nausea, epigastric discomfort, loss of appetite, etc. Immediate discontinuation is recommended.
3, before use, use other skin care products to base: for example, before using niacinamide emulsion products, you can first apply a thin layer of other bottom milk to the skin, and then rub the niacinamide emulsion, which can play a role in moisturizing the skin, adjusting the skin to a better state, thereby reducing the irritation of niacinamide.
4, the use of nicotinamide stock solution must be diluted before use: because the proportion of niacinamide ingredients added to the niacinamide solution is relatively high, so the use of the need to dilute after use, if directly applied to the face is easy to appear acne, stinging and other problems.
5. Start with low concentration when using niacinamide skin care products: that is, choose to start with niacinamide toner, lotion and mask. Because the concentration of niacinamide added to this product is relatively low, it is generally controlled below 2%. After the skin has established a good tolerance, then gradually choose products such as high-concentration niacinamide whitening stock solution and whitening light spot cream.
6. Pregnant women and lactating women are prohibited: try to use niacinamide skin care products during pregnancy, especially taking excessive niacinamide agents, which may cause teratogenicity in pregnant children. Lactating women should not be breastfed when using niacinamide liver protection products.
Finally, I hope that the sisters will pay attention to me, and all the problems in beauty, makeup, health care, etc. can consult me at any time, and I will reply to you at the first time. I wish the sisters a happy day, and the skin is better and better maintained, more and more young and beautiful.