Various fillers have been injected into the lip or in the region around the mouth for lip augmentation purposes. Collagen, fat and hyaluronic acid are just some of them. Hyaluronic acid fillers have been established as the mainstay of lip augmentation because they are fairly simple to inject, produce almost immediate results and last for an appreciable length of time while posing little or no risk to your health.
Hyaluronic acid is a natural substance found in the body and it works mainly by increasing the ability of the skin to retain moisture. Thus, your lips would not wither away or thin continually because of the volume the water retained provides. The retained moisture also has an effect on the shape and structure of the lips. Thus, the general appearance of the lips can be markedly improved by hyaluronic acid fillers.