There are two primary ingredients in this powerful dermal filler. One is bovine collagen. In fact, bovine collagen makes up 80 percent of this filler. The other 20 percent is Polymethacrylate Methacrylate (PMMA). Together, these two ingredients work to increase natural collagen production in an area of the skin for a prolonged period of time. To ensure that you can safely receive Bellafill injections, we'll first perform a skin test. This can be done at your initial consultation visit. A skin test is similar to a tuberculosis test that is performed in certain circumstances. A skin test involves injecting a minute amount of bovine collagen beneath the skin. This form of collagen serves as the vehicle to transport the PMMA microspheres to the area of focus. After the skin test, you'll observe the treated area for 28 days. If, after that time, no reaction has occurred, we can schedule your Bellafill treatment!