Brand from United States: Kiehl's. Retinol, which is a type of vitamin A and is expected to be an excellent aging care ingredient focusing on collagen and hyaluronic acid.On the other hand, it is also known as an ingredient that is easily irritating to the skin.Kiehl's has developed a micro retinol ingredient that suppresses irritation while firmly delivering conventional effects, and has realized an aggressive and protective retinol beauty essence that can be used for all skin types including sensitive skin.In addition, the peptide that focuses on elastin delivers more bouncy elasticity, and ceramide and niacinamide protect the skin from external stimuli.Retinol A light cream that makes use of the original color delivers dense moisture, while working on multiple complex skin problems for adults, such as dry fine lines, reduced firmness, pore impression and texture disorder.In addition, it is an easy-to-continue beauty essence that can be used on the entire face, including around the eyes.Care that g