Including retinol, retinaldehyde, and retinyl esters. It was the famous Dr. Albert Kligman who introduced them into cosmetics. He was also the dermatologist who first proposed the concept of “Cosmeceutical”.
Vitamin A is one of the essential nutrients for the human body. The vitamin A in our body usually comes from the vitamin A precursor in food: carotene, which is cleaved into two cis-vitamin A aldehydes by the BCMO1 enzyme in our body. Vitamin A deficiency in the human body will cause symptoms such as dry and rough skin, night blindness, and dry and softened cornea.
After “marrying” skin care products, the various functions of vitamin A on the skin have been discovered one by one. It is simply the Mary Sue of skin care ingredients: wrinkle removal, whitening, acne removal, exfoliation, anti-photoaging, and improvement of skin barrier function. , except for sun protection, it covers almost all functions of skin care products. The only disadvantage is that it is too violent and irritating. After the retinol is photolyzed, it will directly react and cause damage to the skin.
