Core Nutritionals is headed by drug-free pro bodybuilder Doug Miller, and his wife, drug-free pro figure competitor Stephanie Miller. Sick and tired of supplements that are built around hype and that simply do not work, Doug uses his biochemistry background to focus on producing superior products that are proven to work. Doug personally selects the most effective and highest quality ingredients for his line of supplements, and designs formulas to be effective for both elite and weekend-warrior athletes. Many supplement companies offer fantastic promises with little or no information to back up their claims. Others hide behind secret proprietary blends, which may contain only trace elements of the advertised ingredients. Core Nutritionals always lets the consumer know exactly what is in its products, guarantees guality with rigorous testing, and even backs up product claims with blood work results. Also, all Core Nutritional products are manufactured in the U.S. and in cGMP facilities.