Ultimate CRN-5 is the best muscle building creatine supplement that one can opt for because it has a premium quality formula containing 5 high quality creatines along with aqua- electrolytes. It uses a trustworthy and reliable formula which is supported by professionals and athletes from all around the world. It is superior in taste as well as in formula when compared to other regular creatine formulas in the market. The 5 types of creatine support ATP production in the body and the added electrolytes provide extra hydration to the muscles.