Proyouth® is a synthetic xylose derivative and chemical name hydroxypropyl tetrahydropyrantriol, a kind of extra cellular matrix that can directly affect the three-layer structure of the skin. It can promote the synthesis of collagen, help the epidermis and dermis to connect closely and increase the elasticity of skin. Hydroxypropyl tetrahydropyranol promotes the synthesis of type IV and VII collagen and regeneration of damaged tissues by increasing the expression of CD44 protein, syndecan 1 and 4 and Variation of Perlecan expression.It was first developed by L'Oreal. The research shows that the more the proportion of S diastereoisomer, the better the efficacy. Coachchem lab has obtained higher optical purity, that is, higher proportion of s diastereoisomer through chiral catalysis technology. In terms of market application, it is mainly used by high-end brands of L'Oreal. Under the new regulations, the innovative research and development of higher efficacy anti-aging active substances is conducive to the rise of domestic cosmetics brands. It can be biodegraded and is a very green anti-aging active substance.