I received an interesting note about the supplement creatine, a compound from three amino acids that is mostly found in the body's muscles and brain. It was from an older reader who takes creatine and ...

Here’s the simple version of how creatine works: Your muscles use adenosine triphosphate (ATP) for quick bursts of energy, but ATP runs out fast during intense exercise. Creatine helps regenerate ATP, ...

More people are turning to creatine as part of their fitness goals. Medical experts explain the benefits, risks and who should not use it. As more people set fitness goals for 2026, interest in ...