CytoSport, Benicia, CA, has added Muscle Milk Light 100 Calorie Shake to its line of protein-enhanced beverages. An “excellent source” of protein (15 grams), this sugar-free product contains 100 calories and is lower in fat and sodium than the original Muscle Milk Light. The product is available in Chocolate, Chocolate Mint, Mocha Latte, Strawberries ‘n Creme, and Vanilla Creme flavors.