A macro-based approach to simple and sustainable weight loss Say goodbye to calorie counting with this revolutionary weight-loss method. Macronutrients or 'macros' are the three main nutrient groups that your body can't live without: carbohydrates, fats and protein. So many diets focus on calorie counting, but all calories are not created equal: your body doesn't process 20 calories of kale and 20 calories of chocolate...