Creatinine is a waste product produced naturally by the muscles as they use energy. Healthy kidneys filter it from the bloodstream and excrete it through urine, maintaining balanced levels. When ...

Wendy Wisner is a journalist and international board certified lactation consultant (IBCLC). She has written about all things pregnancy, maternal/child health, parenting, and general health and ...

Although they share similar names, creatine and creatinine are two distinct compounds. Creatine is a naturally occurring substance in your brain and muscle tissue that gives your muscles energy.