Which whitening effect is better, vc or nicotinamide?
If there are few ingredients in skin care products that have been scientifically and strictly proved to be useful, then there is no doubt that vitamin C is one of them. After double-blind experiments, human experiments and human in vitro tests, VC can dilute melanin, make acne marks recover faster, and the tanned face can restore whiteness faster, which is good news for girls with whitening needs. Secondly, it can slow down skin aging, resist free radicals and keep skin clean for a long time. Especially in slowing down the rapid sinking of oil skin. Although VC products are good, we should not pursue high concentration excessively, especially at the beginning, we should gradually increase from low concentration to establish tolerance. Nicotinamide, the name may be strange and difficult for people who meet for the first time, but as long as you mention its alias, it will definitely make you feel more cordial-VB3 is an important member of the vitamin family that we are very familiar with. Scientific research has proved that nicotinamide can promote the metabolism of melanin keratinocytes and reduce the transfer of melanin to surface cells, thus achieving whitening effect. The "skin barrier damage" often accompanied by acne muscles can also be alleviated by nicotinamide, which can enhance the skin barrier function by increasing the ceramide content in the stratum corneum, so that the skin can better fight acne.
Reducing agent: vitamin C and its derivatives
Advantages: high safety.
Disadvantages: the whitening effect is not thorough.
Vitamin C and its derivatives can effectively reduce the formed melanin to colorless melanin precursors, and are also essential components for human body to maintain metabolism, with good safety. However, the whitening effect is not thorough enough in the second half of pigmentation.
Melanin transport blocker: nicotinamide
Advantages: the effect is average.
Disadvantages: intolerance
Nicotinamide can effectively inhibit the transfer of melanin from melanocytes to keratinocytes by about 35%-40%, thus reducing excessive pigmentation. The fly in the ointment is that nicotinic acid, an impurity in its raw material, can cause skin redness and allergies, leading to nicotinamide intolerance.
Which is whiter, vc or nicotinamide?
VC class
1, ROHTO le dun Melano CC VC beauty liquid essence
Many basin friends who have made achievements in whitening should have heard of or used this VC essence. It has a high reputation and a good reputation. He has won many awards in the Japanese COSME Award and has the glorious title of "Whitening Fair King". At the same time, the composition is simple and there are not many good words. The dual formula of active vc and ve is adopted, and ve is used as inducer, so that active vc can penetrate into the skin faster, thus reducing pigmentation, achieving whitening effect and improving local spots and acne marks. In addition, potassium glycyrrhizinate is added to reduce the irritation of whitening ingredients to the skin while diminishing inflammation. Transparent oily texture, fresh lemon taste, 5-6 drops at a time can completely wipe the face, one branch contains 20g, and can be used for more than 2 months. Of course, the price of the first one is beautiful. If you want to try whitening at the beginning but don't want to invest too much money, you can start with this one first.
2. Dr. Ci.Labo Dr. Ye Cheng 377 VC Whitening and Freckle Removing Essence
Although this product is called "Dr. Ye Cheng Whitening Concentrated Freckle Cleanser", it is actually a cream texture, and it is no problem for basin friends who are not poor in money to use this tube essence as a cream. After pushing, the texture is moist, moist and not greasy, and the eyes can be used normally. Dry skin does not have to worry about peeling and dryness. In terms of composition, Synmwite377, a well-known patent component, can improve uneven skin color, reduce skin coloring caused by ultraviolet radiation, prevent the formation of black spots and dilute acne marks. Plus highly saturated VC inducer, the whitening effect is stronger. Of course, there are also some anti-oxidation and anti-saccharification components, such as carnosine, milk thistle extract, VE and so on. From the packaging point of view, vacuum bottles and fine nozzles are used to control the dosage. There is a small window on the back of the bottle to see the dosage of the product. One bottle 18g, you can completely wipe your face by pressing two pumps at a time, which can last for about a month.
3. Dr. Sebagh Seberg vitality repair VC powder 5g.
Comrades walking on the road of whitening should be familiar with this product, not only because of its shape-it is a calibrated test tube, but also because of its powdery texture. Although VC has strong whitening and antioxidant functions, its properties are unstable and it is easy to lose its activity when it comes into contact with air. Cybertron VC powder completely seals high-concentration pure VC in the form of powder in a small test tube through the unique patent "T.E.P powder ore introduction technology", which minimizes its contact with oxygen and greatly improves the stability and freshness of VC. And a special "pulverization cream" technology is adopted-it is a poured dry powder, which will be transformed into cream texture when pressed and wiped on the skin, so that the active ingredients can better penetrate into the bottom layer of the skin, relieve inflammation and dilute acne marks and spots. Specifications are divided into 5g/ piece and 1.95g/ piece. The use method is very flexible, and you can press it on the pigmented part to break the old acne marks one by one. It can also be used in skin care products of any texture. But you must hold your breath when using it, or you will realize that it is not powder flying all over the sky, but my money and broken heart. ...
nicotine
1, ordinal number 10% nicotinamide+1% zinc whitening essence.
This is a nicotinamide essence, which has not taken the usual path since it came out. Why do you say that?
First, birth. Ordinary is the brand of Canadian DECIEM beauty company. She is only five years old. The company's philosophy is "THEABNORMAL BEAUTY COMPANY", that is, "an abnormal beauty company".
Second: naming. Different from the more common illusory+tall names, such as "Baizhen enjoys rejuvenating and repairing multiple essences", the name of each product is very straightforward, such as "10% nicotinamide+1% zinc essence". At the same time, in official website, the content of various components, whether it contains silicon, whether it contains alcohol, etc. Basically, it's all written clearly. It's outrageous.
Third: composition. This 10% nicotinamide essence came out. It is said that it was punched and kicked in a small white bottle, and 1% zinc was added to the essence. Don't underestimate the 1% which mainly controls oil. Because of its existence, the oil control ability of this whitening essence should not be underestimated. Because the concentration of 10% is already a strong drug level, you must establish your own skin tolerance before using it. You can start with a small white bottle of Olay and a small green bottle with low concentration, or you can try it on the back of your hand and behind your ears before using it in a large area. Wall skin is convenient for sensitive muscles to use with caution ~
Fourth: the price. Low.
2. Olay Pro-X by Olay Poetry Brightening and Freckle Removing Essence
This whitening essence has always been called "a cheap substitute for light bulb" because it and light bulb are both born by the same mother and belong to the same company-Procter & Gamble, and both of them contain high concentration of nicotinamide, which can not only effectively dilute melanin and dark yellow skin, but also improve uneven skin color after silence, acne and inflammation. Its highlight is that it not only relies on the star ingredient nicotinamide to fight alone, but also has a strong support club. For example, the exclusive patent component of Olay, sugar kelp extract (what is not important, what is important is:) can resist oxidation, diminish inflammation, saccharify, and improve yellowing, pigmentation and other problems; Undecanoyl phenylalanine (skip the name to see the effect:) reduces melanin production, accelerates pigment metabolism, and achieves the effect of fading spots. Adopt dropper design, light milky white and refreshing texture, easy to extend and absorb, once 1-2 dropper can wipe the whole face, and 40ml in the morning and evening can be used perfectly for one month. If the skin is tolerant, the effect of subsequent superposition of Neutrogena A alcohol is better.
3, SK-II GENOPTICS freckle essence muscle light accumulation freckle essence
As we mentioned above, Olay prox is called "a cheap substitute for small light bulbs", not just a small white bottle. Every whitening product with good effect on the market always seems to compare or step on a small light bulb to show good effect. But why did the little light bulb sit firmly on the throne of the White House empress for several years? The answer is, ingredients, ingredients! Needless to say, P&G likes nicotinamide. As a member of SK-II, how could it be that there is no patent for PITERA? Because it is a private patent, it is difficult to find out the details of PITERA, except that it can meet the needs of skin hydration, repair and whitening, which can be described as a perfect supplement. In addition, titanium dioxide, mica, CI7789 1 colorant are also used to make the skin white and bright, and turn into a "small light bulb" every second. The round ceramic dazzle bottle body is a good packaging carrier which is light-proof, temperature-proof and oxidation-proof, which perfectly solves the problems that PE materials are easy to react with ingredients and glass materials are not light-proof. Of course, the price is also higher than the other two materials. Vacuum dropper suction pump is used, one pump at a time is exactly the dosage of the whole face, which is safe, hygienic and intimate.
Do VC derivatives have the same function as VC?
Although VC has three functions with the highest demand for skin care, it is a pity that VC products are very unstable, and the high-concentration VC essence has a low PH value and is irritating to the skin. Therefore, adding VC to skin care products requires higher technology. Of course, at present, many VC essences have commonly used derivative forms of VC to improve the stability and gentleness of products. VC derivatives have the same chemical structure as VC***, but have an extra "tail" than VC, so they are not easy to be inactivated by oxidation. For example, AA2G (ascorbic acid glucoside), which you may be familiar with, adds a glucose group on the basis of VC, and its stability is greatly improved. VC derivatives can not play a direct role, and only when they are converted back to the original form of VC in the skin can they continue to play their antioxidant role. Moreover, the conversion rate of different forms of VC derivatives is different, and the effect is definitely not the same as that of the prototype VC with concentration, which is also a compromise scheme for the stability of VC by the formulator.
There are two main reasons why you can't use VC in the morning
VC has photosensitivity. Does light stimulate the skin? In fact, VC is easy to decompose and turn yellow at the sight of light, so it should be used with sunscreen during the day to resist excessive free radicals caused by ultraviolet rays and help the skin to resist oxidation. Because it is impossible for 100% to prevent VC from oxidation and yellowing, if you find that your face turns yellow after using VC, it is only VC itself that turns yellow. After washing your face or stopping using 1.2 days, it still glows white ~
Esterification of derivative c of VC will produce free radicals in the product, which will irritate the skin? This reaction is used to counteract the free radical and lipid peroxidation produced by skin, that is to say, it is a reaction in the antioxidant effect of VC. Bottom line: you can use VC during the day, just add sunscreen ~