Classic Whey is Optimum Nutrition's premium, economy protein supplement and is made with 100% Whey Protein. Each serving provides a time-tested blend of Whey Protein Concentrates (WPC), Ion-Exchange Whey Protein Isolates (IE), Micro-filtered Whey Protein Isolates (MF), and partially hydrolyzed Whey Peptides - each of which are considered to be of the highest biological value (BV) because they are loaded with indispensible amino acids and very easily digested and absorbed. Classic Whey is particularly rich in the three Branched Chain Amino Acids (BCAAs) and is a good source of glutamine and glutamine precursors. In addition, Classic Whey contains smaller proteins called microfractions including alpha-lactalbumin, beta-lactoglobulin, immunoglobulins, glycomacropeptides, and lactoferrin that may have various health and performance benefits beyond supplying essential nitrogen-based compounds. Best of all, Classic Whey is instantized to mix easily in a blender, shaker cup, or even with just a glass and spoon, so you can enjoy the benefits of whey proteins just about anywhere! However you use it, Classic Whey is an ideal protein supplement for most nutrition programs.