Precision Engineered Muscle & Size Gainer is formulated to work as hard as you do. It contains high quality milk and egg protein nutritionally balanced with 9 essential vitamins, 6 essential minerals, and 18 amino acids. The free and peptide bonded amino acids in this formula work synergistically with the branched chain aminos for maximum protein absorption and usage. Natural energy packed carbohydrates are also included. Precision Engineered Muscle & Size Gainer is formulated to work as hard as you do. It contains high quality milk and egg protein nutritionally balanced with 9 essential vitamins, 6 essential minerals, and 18 amino acids. The free and peptide bonded amino acids in this formula work synergistically with the branched chain aminos for maximum protein absorption and usage. Natural energy packed carbohydrates are also included.