The 2 Types of Collagen Your Body Loves As we get older, our bodies slowly make less collagen. Collagen is a protein  that helps hold our body together. It keeps our skin firm, our bones strong, and our joints moving smoothly. Because collagen is so important, learning how to support it can help us age in a healthy way.  There are many kinds of collagen in the body, but two types matter most when it comes to healthy aging. These are Type 1  collagen and Type 2  collagen. Each