Oral hyaluronic acid has a moisturizing and lubricating effect on cell tissues, which makes the skin full and young and elastic. However, with the increase of age and the aging of the body, hyaluronic acid begins to lose at the age of 18, and accelerates loss after 25 years old. When the acid loss rate is faster than the growth rate, it should be supplemented with hyaluronic acid from the outside. The 30-year-old skin, hyaluronic acid content is only 65% of the baby's period, and only 25% of the 60-year-old, the moisture in the skin will follow. When hyaluronic acid disappears, the skin becomes dehydrated, loses its luster and elasticity, and gradually becomes wrinkles, rough dullness, spots and other aging phenomena. Therefore, oral hyaluronic acid or hyaluronic acid-containing health care products have gradually become a must-have moisturizing magic weapon for women.