Creatine is a naturally occurring nutrient that is found in food. It's also a safe and beneficial supplement. Creatine can improve your strength and energy and help you naturally increase muscle mass. Plus it can reduce your risk of heart attack and improve brain function and memory.
Unfortunately, creatine has gotten a bad name because it's frequently associated with performance enhancing drugs. Many athletes and bodybuilders supplement their diets with creatine ... because it works. It is one of the few performance-enhancing supplements backed by mounds of published studies.
If you want to use creatine, buy 100% pure creatine monohydrate, mix it with water, and drink it immediately. Don't waste your money on capsules - they're not cost effective. And avoid "creatine-added" drinks. It is unstable in liquid and these drinks have never been proven to have the same effect.