Before the age 18, the collagen and elastic fibers in the skin are active,and the skin itself is full of water. After the age of 18, the nutrients in skin drain away and the skin problems become apparent. The main function of hyaluronic acid mask is to replenishments and water locking. It is the most basic skin care product and is suitable for people of any age group. However, considering the needs of the skin and the effect of use, we would recommend that people of some ages use it better.