Lip fillers are a specialized gel injected into thin lips to enhance their fullness or achieve a desired shape. Typically, they contain hyaluronic acid, which works by absorbing water from nearby tissues, acting like a sponge, and providing a plump and firm appearance. Additionally, they stimulate collagen production, a natural component of the skin responsible for structural support. As hyaluronic acid is an organic component found in the tissues, lip fillers yield natural-looking results by supporting the body’s natural functions.