Creatine is a compound that is made in our bodies, is eaten in our food and can be taken as a dietary supplement. The chemical name for Creatine is methyl guanidine-acetic acid and supplies energy to muscle cells for short bursts of energy (such as lifting weights) via creatine phosphate replenishment of ATP. Creatine is made up of three amino acids - Arginine, Glycine and Methionine, our liver has the ability to combine these three amino acids and make creatine. Unlike steroids or other performance-enhancing drugs, creatine exists naturally in many common animal protein sources such as herring, tuna, salmon, and beef, making it difficult to ban it from sporting competitions. A number of scientific studies have shown that creatine can increase strength, energy, muscle mass, and reduce recovery time. In addition, recent studies have also shown that creatine improves brain function and reduces mental fatigue.
It increases what is known as cell volumization by drawing water into muscle cells, making them larger. This intracellular retention should not be confused with the common myth that creatine causes bloating/intercellular water retention. Creatine is sold in a variety of forms, including creatine monohydrate, creatine ethyl ester, creatine alpha keto gluterate, tri-creatine malate, creatine citrate, magnesium creatine chelate. Though all types of creatine are sold for the same purposes, there are differences between them, such as price, necessary dosage, effectiveness, utilization, and bioavailability.
Claims that creatine could be stressful to the kidneys due to primary renal elimination via creatinine have been proven false through studies conducted by universities and independent organizations.
If you’re interested in more history and details about creatine from an unbiased third party source please go this Wikipedia link: Creatine Supplements on Wikipedia