Bellafill’s tiny, polymethyl methacrylate (PMMA) microspheres are suspended within a base of smooth collagen gel. Once injected, the collagen gel immediately reduces the look of smile lines. Over time, your body uses the microspheres in Bellafill to create a “scaffold” onto which your own natural collagen can develop. This collagen forms a foundation that adds volume to wrinkles, reducing their appearance – and giving you natural-looking results that feel soft and smooth for up to 5 years.