In addition to making Gold Standard 100% Whey, the worlds' best-selling whey protein, Optimum Nutrition created the slowly digesting protein category with Gold Standard 100% Casein. ON also created the anytime energy category, which remains dominated by Essential Amino Energy.
Before a single machine is turned on in our manufacturing facilities, Optimum Nutrition procurement professionals carefully select the most premium raw materials. A Certificate of Analysis is required for every ingredient, which is then tested and retested for compliance. Quality assurance performs daily inspections of our current Good Manufacturing Practices (cGMPs) compliant facilities, which are GMP Registered and GMP for Sport by NSF.