Hyaluronic acid is a water-loving compound and one of the main components of the skin's connective tissue, it is naturally produced by your body. The largest amounts of it are found in your skin, connective tissue, and eyes. Its main function is to retain water to keep your tissues well lubricated and moist.
However, the natural aging process and exposure to things like ultraviolet radiation from the sun, tobacco smoke and pollution can decrease its amounts in the skin.
Hyaluronic acid supplements can help increase skin moisture and reduce the appearance of fine lines and wrinkles. Topical treatments can soothe redness and dermatitis, while injections can make skin appear firmer.