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Retinol is the first anti-aging ingredient approved by FDA. It is also the most effective and irritating ingredient of all a alcohols and a esters currently available in skin care products. It has an irreplaceable position in anti wrinkle, fade fine lines, fade wrinkles, anti-aging, and even delicate skin and fine pores. The long-term use of retinol for skin care can indeed make the skin better. The use of wrong retinol is likely to make the skin worse.
Functions and side effects of retinol
Skin care effect of retinol
Retinol is used in cosmetics. Albert M. Kligman, the father of acne, used retinoic acid, a derivative of vitamin A, in the treatment of acne. At the same time, he found that the skin lines on the part coated with retinoic acid became lighter, the skin became tender and the pores became thinner, so he found that retinoic acid had anti wrinkle effect.
Later, it was found through experiments that retinol has the same effect as retinoic acid in improving skin fine lines, wrinkles, weakening acne marks and improving pigmentation. Although retinol plays a role by eventually converting into retinoic acid, it is milder than retinoic acid. Retinol has become the first anti-aging ingredient approved by FDA and has been gradually used in skin care products.
With the in-depth study of retinol, more skin care effects of retinol have been excavated. At present, the confirmed skin care effects include:
- Regulate the secretion of oil by sebaceous glands, control the activity of Propionibacterium acnes, and reduce the occurrence of acne and acne.
- It can promote the formation of collagen in dermis, increase the thickness of dermis and delay aging.
- While increasing the number of epithelial growth factors and accelerating the metabolism and renewal of epidermis, it can weaken the thickness of cuticle on epidermis in a short time, so as to make the skin look more delicate and smooth. Long term use can increase the overall thickness of epidermis.
- Under the joint action of dermis and epidermis, it has a certain degree of fine pore effect.
- Improve the skin's ability to resist ultraviolet rays and reduce the probability of sunburn by ultraviolet rays.
Side effects of retinol
Although retinol is a relatively mild component relative to retinoic acid, its photosensitivity determines that it has great restrictions on its use, and its easy transformation also determines that it has the same irritation as retinoic acid.
- It is easy to absorb ultraviolet rays and be oxidized. If retinol skin care products are used, it may turn black without sunscreen, and sunscreen may also turn black.
- Retinol is easy to be converted into retinoic acid and has certain irritation. Improper use will cause erythema, skin sensitivity and peeling.
- May cause fetal malformation
According to clinical studies, oral high dose (2500 μg) retinoic acid will cause fetal malformation, and topical retinoic acid can also be absorbed into the body through skin. Although in some professional studies, due to the slow conversion of retinol, the use of retinol skin care products will not bring such trouble, and there is no actual case to show that retinol in skin care products has an impact on pregnant women, for the sake of safety, pregnant women and lactating women must carefully use skin care products containing retinol, especially retinoic acid.
A lot of people may be interested in another waterproof liquid foundation of our company, so let's introduce it next.
Function of Foundation Fluid
You can use contrasting colors, such as reddish skin, and use the green base liquid to achieve the effect of whitening.
Some of the chemical components of the foundation solution contain oil control effect. The principle is to suck the grease secreted on the surface, so that the oil on the user's face will decrease.
Some of the foundation liquid also contains sunscreen function. Generally there will be a SPF display.
Choice of Foundation Fluid
First of all, it is very important to choose the nature of liquid foundation. We must choose water based liquid. In this way, it doesn't take much effort to apply, and it's easy to apply makeup evenly.
Secondly, choosing color is very important, especially for friends with smallpox and India. Don't choose white foundation liquid. Choose natural color or yellowish color. Otherwise, it will not cover up the blemish, and makeup will not be natural.
Then, choosing the formula is very important. We must choose the oil-free formula. The higher grade liquid foundation is long time without makeup and makeup.
Identification of Foundation Fluid
See whether the lead in the foundation is excessive
A little liquid foundation is on the back of your hand. After half a minute, you can draw a coin with a dime coin (old coins) on the base of the painting. If there is a very deep colored road, it indicates that the lead content of the liquid foundation exceed the standard. If you use this foundation liquid for a long time, it will do great harm to the skin.
Determination of water solubility of Foundation Fluid
We all know that if it is not soluble in water, there must be oil in it. If the foundation is used for a long time, the skin will become acne. Check whether the foundation solution is water soluble, use a transparent glass, fill the water, then drop a few drops of the foundation liquid in the water, and then stir it with cotton swab. If the foundation liquid can completely melt with the water, it shows that the foundation liquid is water melted and its ingredients will not clog the pores. If the foundation liquid can not melt with water, it will be granular or powder adhered to the glass. And when you pour the water out, the glass is not easy to clean. That means that the foundation liquid is mixed with oil, and can not be absorbed by the skin. Moreover, long time use can easily cause pores blockage and easy to grow acne and acne.
Use of Foundation Fluid
When painting, pay attention to the foundation before painting liquid to ensure that your face is in a humid state. Many beauticians will have a moisturizing and moisturizing cosmetics before they go to the foundation. So we need to understand that the face can be easily put on makeup after full moisturizing. First let your skin cream absorb once and then apply it again. The second time has not yet been absorbed enough. Just paint the foundation quickly.
Of course, the liquid foundation can not be smeared and smeared evenly on the face like the skin care product, especially for those friends who are not smooth in the pit pit. The correct way is to squeeze the liquid foundation into the three fingers in the middle, then gently pat the liquid foundation on the face with both hands, and take a lot of pits in the pit or traces, and the amount of extrusion can not be too much at a time, but it can be repeated many times, so that the pit can be filled up, the traces can be covered up, and the face will look very smooth.
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