Teosyal is dermal filler injected under the skin to add volume and smooth fine lines, wrinkles, imperfections and signs of aging. It also creates volume and can be injected into the lips, cheeks and nasolabial folds as well as soften angles in the jawbone. The active ingredient, hyaluronic acid, is naturally found in the body and gives the skin an elastic and youthful appearance. Hyaluronic acid naturally decreases with age and Teosyal injections replace the missing hyaluronic acid.