Klean Creatine contains pure creatine monohydrate to increase muscle mass when combined with resistance training. If you take part in sports that require bursts of intense and repeated physical activity, creatine will also help you improve your body strength, enhance performance and build power by increasing intramuscular energy levels. Animal muscle - such as fresh meat and fish - contains significant amounts of creatine. Dairy products contain only small amounts. Since vegetables, grains, nuts and pulses do not contain creatine, vegetarians are more likely to have suboptimal levels than meat eaters.