Does creatine make you smarter?

# Summary Creatine is a normal nutrient found in meat and synthesized by the body that helps deliver energy to cells. Common concerns about creatine causing baldness or increasing testosterone are unfounded—they stem from speculation around a single, disputed 2009 study contradicted by subsequent research. Creatine supplementation is safe and has strong evidence for increasing strength by 5-15% and sprint performance by 1-5%, though it provides little benefit for endurance exercise.