Zone Perfect macros bars have a balanced blend of macronutrients—40% carbs for energy, 30% protein for strength, and 30% fat for nourishment (as a percent of calories). that's a proven macros ratio for total body wellness when used with a 40/30/30 lifestyle plan for weight loss and maintenance. With 15g of high-quality protein and 1-2g sugars, these bars are a smart on-the-go snack.