MASS 1000 has more protein than many other 1000 calorie weight gain formulas. Each serving provides you with a whopping 34 grams of amino acids and protein. MASS 1000 has MORE CARBOHYDRATES than many other 1000 calorie weight gain formulas. That means more energy for working out. MASS 1000 has LESS FAT than many other 1000 calorie weight gain formulas. After all, you're training to build lean mass and power - not fat.