Pro-Cal 100 Shakes from R-Kane's original formula. Available in Chocolate, Vanilla, Cappuccino, and Strawberry Flavors. The Pro-Cal 100 Shakes provide every essential vitamin and mineral, plus 150% of the US RDV of Protein. Each serving contains 100 calories and 15 grams of protein. 1 box of Pro-Cal 100 Shakes contains 12 single serving packets which can be mixed with an 8 oz. glass of cold water. Simply add water and stir. Pro-Cal 100 Shakes are most commonly used in physician monitored weight loss protocols. We also carry the complete Pro-Cal line of products along with other Dr recommended brands for weight loss. Doctor Recommended: For more information click here.