Product DescriptionFaster digesting protein is desirable immediately before and after exercise to help refuel recovering muscles, but slow digestion and absorption may be more beneficial at other times including bedtime when your body typically goes for hours without food. Casein products are acid sensitive and thicken in the stomach. Compared to some other proteins, it can take longer for our Gold Standard 100% Casein to be broken down into its amino acid subcomponents. By using only premium micellar casein as a protein source, we’ve created a formula that sets the standard for slow digesting protein support.Amazon.comOptimum Nutrition Gold Standard Natural 100% Casein offers the slow-digesting protein essential for facilitating muscle recovery and preventing muscle breakdown. Rapid-protein use is desirable immediately before and after exercise to help refuel recovering muscles. However, delayed digestion and absorption may be more beneficial at other times, including bedtime, when your body typically goes for hours without food. Casein proteins are acid sensitive and thicken in the stomach. Because of this, it can take more than twice as long for Optimum Nutrition Gold Standard Natural 100% Casein to be broken down into its amino acid subcomponents than other proteins. This natural version of the industry’s first all-micellar casein contains no artificial flavors or sweeteners.Quality Counts: GMP Certified ProductsOptimum Nutrition’s commitment to quality is evident throughout the entire product development process. As a continued measure of quality, all vendors must provide a Certificate of Analysis for each raw material supplied. The certified analyses are also verified through random in-house and independent laboratory testing. To further diminish any chance of physical, chemical, and microbiological contaminants, ON has established and implemented a Hazard Analysis Critical Control Point (HACCP) program. Quality assurance professionals make routine checks on all storage, blending, and production areas and conduct daily inspections.ON is proud that its in-house manufacturing operation has been registered under the NSF International, The Public Health and Safety Company, Good Manufacturing Practices (GMP) Program. Together, these practices and procedures allow ON to consistently deliver first-rate sports nutrition supplements under the strictest quality control standards.About Optimum Nutrition: True StrengthSince 1986, Optimum Nutrition has been supporting the nutrition goals of elite athletes and goal-driven individuals around the world. Building on a foundation of company owned and operated production facilities, unparalleled manufacturing expertise, and uncompromising quality standards, ON continually strives to bring athletes and active individuals sports nutrition solutions designed to make a real difference in performance. Whether your goals involve strength, speed, power, endurance – or any combination – ON supplements work as hard as you do. Realize your True Strength with the quality and innovation leader.What’s in the BoxOptimum Nutrition Gold Standard Natural 100% Casein, Chocolate Creme, 4 pounds.