Collagen is a major factor in keeping strong healthy joints for lifting, sports and joint soreness in general. Collagen is also used to keep and bring back the elasticity in our skin which minimizes wrinkles, helps us have stronger hair as well as many other benefits. While other brands only contain 1-3 types of collagen, Heick Fitness Collagen Complex contains 5 types! Types I, II, III, V, and X!