Creatine is a peptide (a short string of amino acids) that every human produces on their own. This molecule is part of our bodys energy systems: it combines with a molecule of phosphate to form creatine phosphate, which can be broken back apart to regenerate ATP the energy currency of the body. Gnarly Nutrition uses Creapure as the sole ingredient in Gnarly Creatine. Creapure is the highest quality and most widely studied form of creatine. Creapure is vegan, IFS FOOD certified and both Kosher and Halal certified.