Vitamin,acid,derivatives,Vitam health Vitamin A acid derivatives
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Vitamin A acid used in cosmetic raw materials has three derivatives forms, namely - A aldehyde, A alcohol, Aesters. Vitamin A acid not only can suppress acne, but also can anti-wrinkle,scavenge free radicals, improve pigmentation, promote hair follicle epithelialcell differentiation, inhibit sebaceous gland activity, shrink pores, correctabnormal keratinization, accelerate skin metabolism; at certain concentrations,vitamin A acid can stimulate fibroblast cells, promote collagen and elastinsynthesis, reduce fine lines and wrinkles, improve photoaging. But such a miracleingredient is also not perfect, Vitamin A acid in the sun and the air is verydelicate and easy inactivation, strong irritant to the skin is also anindisputable fact, so sunscreen is very important.Threemost important derivatives: A aldehyde is closest to the vitamin A acidderivative form, its irritation compared to all-trans acid A is much milder; Aalcohol, is a vitamin A form can directly intake from certain foods (such asfish oil liver), or indirectly intake from carrotene (such as tomatoes,carrots, mangoes, spinach). A alcohol, under the skin will be as all-trans-retinoldehydrogenase catalyzed first converted to A aldehyde, then eventuallyconverted to A acid work on the skin cells. If A esters want to convert to Aacid is a very long way to go, it must first convert into A alcohol, and thenconverted to A aldehyde, and finally convert to A acid.Accordingto tretinoin manufacturer, all-transvitamin A acid has a strong physiological activity, it can combined with sixreceptors in the skin, and its irritation also the strongest, all-trans vitaminA acid is directly prohibited add in cosmetics, only in drugs can see it. All-transvitamin A acid is also a good application drugs for decades, not only for thetreatment of acne have a good effect, on seborrheic dermatitis, ichthyosis,psoriasis and other skin illnesses treatment also contributed.Althoughthe effect of all-trans vitamin A acid is powerful, but not recommended forlong-term use, all-trans vitamin A acid has photosensitivity (it only can useat evening), with a strong irritant and belongs to the category drugs, is notsuitable for long-term large-scale use, appropriate concentration A aldehydesand A alcohols are more suitable for long-term use to help delay aging, althoughit take effect slower, but the actual effect of long-term is no difference withall- trans vitamin A acid. All-trans vitamin A acid should not easily to try,especially higher concentrations (0.05% to 0.1%) all-trans vitamin A acid.Useall-trans vitamin A acid against non-inflammatory acne, probably in the earlyuse of twenty-three weeks can be seen the effect, but effects does not meancure, it generally need to stick with at least six weeks to see a moresignificant improvement. When you see a more significant improvement (usuallythree to six months), can appropriate reduce the frequency of use, its effect alsocan continue.Useall-trans vitamin A acid improve photoaging, probably in the early use of threeto four months can see the effect, but need to stick with using six months tosee more obvious results. Similarly, at the early stage of using all-trans vitaminA acid may be deepen wrinkles, exacerbate the deterioration of dry, sensitive, rednessand so on, at this time, you should continue to insist on using it. Note thatthe all-trans vitamin A acid can improve photoaging damage has occurred, but cannot cure. When the all-trans vitamin A acid play the effects of improving photoaging(usually one year), it only need to coat three times one week to continue maintainthe effect, but after stopping use, the improved skin will as the time passgradually decreasing, return to what they are.Source:http://www.cosprm.com Article Tags: Improve Photoaging, All-trans Vitamin
Vitamin,acid,derivatives,Vitam