hyaluronic acid is present in every tissue of the body; hyaluronic acid's importance cannot be underestimated. retention of water is one of the most important biological functions of hyaluronic acid, 1 second only to providing nutrients and removing waste from cells that do not have a direct blood supply, such as cartilage cells. with a lower than adequate amount of hyaluronic acid, nutrients cannot be moved into these cells and waste cannot be eliminated from cells. all this make it a best choice for cosmetic surgery in the treatment of variou fical or outline defect.