20 g Protein 140 Calories 3 Proteins with Leucine Whey Protein Isolate, Calcium Caseinate, and Micellar Casein Protein Powder Drink Mix Protein40 delivers 3 kinds of high quality protein, for 7 hours of bone and muscle support, with leucine, a branch chain amino acids that stimulates protein synthesis in the body. With no artificial sweeteners or flavors, and only 140 calories per serving, get 20 grams of protein, 50% of your daily magnesium and 30% of your daily calcium needs.