Brand from Taiwan: Dr.Hsieh. Using high-tech coated raw materials and active slow-release technology to enhance skin absorption and reduce the irritation of active ingredients to the epidermis, it is mild and effective.Suitable for oily, dry, normal, combination and sensitive skin.Vitamin A derivatives, also known as retinoids, are a class of compounds derived from vitamin A or having structural or functional similarities with vitamin A, including vitamin A alcohol (Retinol), vitamin A Retinoic aldehyde, Retinoic acid and Retinyl esters.Vitamin A derivatives are widely used in medicines and cosmetic skin care products.At present, there are many scientific researches in the world showing that this kind of vitamin A derivatives can improve many kinds of skin problems.All-round assistance for mature skin, acne skin maintenance, precise anti-acne and fine pores.At the same time improve aging, regulate forehead lines, nasolabial folds, and neck lines, firm and delicate skin, block dark melanin, crea