CREATINE : BEYOND MUSCLES AND POWER When most people hear “creatine,” they picture bodybuilders or athletes chasing bigger muscles. But the story behind this molecule is much bigger than the gym. Creatine, naturally produced by your body, plays a vital role in keeping not just your muscles, but also your brain and heart running at full speed—especially when you need a quick energy surge (Boroujerdi, 2026). Beyond the Weights: How Creatine Really Works Produced in the liver, kidneys, and pancreas from amino acids, creatine travels through your bloodstream to tissues with high energy demands. About 95% of it is stored in skeletal muscle, but smaller amounts are transported to the brain and heart. Once inside a cell, creatine is converted into phosphocreatine, which helps rapidly regenerate adenosine triphosphate (ATP)—the molecule that powers everything from your biceps to your neurons (Handbook of Creatine and Creatinine In Vivo Kinetics, 2026). This quick ATP boost is why creatine is a...