In response to my recent column on creatine, a reader inquired about the difference between creatine versus creatinine. Are they related, and if so, how? Good question, and a topic that often surfaces ...

Creatine is a natural substance that helps supply energy to muscles. Creatinine is a waste product produced when creatine is broken down. Rhabdomyolysis, or "rhabdo," occurs when excessive creatinine ...