Retinol powder, also known as A alcohol, is a type of vitamin A. It is a fat-soluble alcohol substance that has the function of regulating the metabolism of the epidermis and stratum corneum. It can resist aging, reduce sebum secretion, and lighten epidermal pigments.
Retinol is easily oxidized and decomposed under ultraviolet rays. The development of liposome technology also provides protection for sensitive ingredients such as retinol to prevent their degradation.
COA
| Items | Specification | Method |
| Appearance | Pale yellow or white flowing granule | USP |
| through sieve No. 40 | 100 % smaller than 40 | USP |
| through sieve No. 60 | min.80 % smaller than 60 | USP |
| through sieve No. 100 | min.15 % smaller than 100 | USP |
| Loss on drying | ≤5% | USP |
| Sulfated Ash | <1% | USP |
| Pb | <10ppm | USP |
| Arsenic | <3ppm | USP |
| Vitamin A Palmitate | ≥250,000IU/G | USP |
| Total bacterial count | ≤1000Cfu/g | USP |
| Coli form bacteria | ≤30MPN/100g | USP |
| Fungi and yeast | ≤100Cfu/g | USP |
| Salmonella | Negative/25g | USP |
1.Vitamin A can act on the epidermis of the skin, promote cell reproduction, maintain normal skin circulation, repair lost collagen, and reduce wrinkles and signs of premature aging.
Retinol can promote the secretion of glycosaminoglycans (GAG).
Retinol can promote the synthesis of type I collagen and type III collagen. After 24 weeks, it can be clearly observed that the collagen in the skin has increased.
Retinol and retinol esters are converted into retinoic acid under the action of enzymes on the surface of the skin, stimulating the growth and tight arrangement of keratinocytes, and promoting the synthesis of collagen and elastic fibers. Therefore, they are effective in anti-aging, anti-photoaging, acne removal and whitening.
1.The European Scientific Committee on Consumer Safety (SCCS) estimated through research that the skin absorption rate of retinol is about 5.7%. The new EU regulations limit the retinol content of leave-on and rinse-off skin care products to 0.3%, and the upper limit of retinol content in body care products is 0.05%. Dr. Ahmed said that lower levels of retinol are still effective, even at 0.1%. Norway stipulates that the maximum content of retinol in cosmetics is 0.3%, and retinyl palmitate is 0.7%.
Reference
[1]. Zasada M, et al. (2020). A clinical anti-ageing comparative study of 0.3 and 0.5% retinol serums: A clinically controlled trial.
[2]. Mcdaniel DH, Mazur C, Wortzman MS, Nelson DB. Efficacy and tolerability of a double-conjugated retinoid cream vs 1.0% retinol cream or 0.025% tretinoin cream in subjects with mild to severe photoaging. J Cosmet Dermatol. 2017;16(4):542-548. doi:10.1111/jocd.12381.
[3]. Dhaliwal S, Rybak I, Ellis SR, et al. Prospective, randomized, double-blind assessment of topical bakuchiol and retinol for facial photoageing. Br J Dermatol. 2019;180(2):289-296. doi:10.1111/bjd.16918.
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