Creatine is known to support muscle growth, increase power and power endurance, as well as increasing muscle resilience. However, recent evidence has suggested that creatine might also improve bone mineral density and support cartilage formation.
The enzyme Creatine kinase is key to cellular energy processes needed for the formation of bone. Creatine kinase is also needed for cartilage formation, so it completely stands to reason that creatine could help in these processes. It should be noted that the studies have not been finalised in humans, but the results and current body of knowledge is strongly indicating that creatine may have a significant, cost effective part to play in bone health too!
Wallimann, T. A. (2014). Medical Sports Network. The mechanism and diverse application areas of creatine. Succidia.