What are Macros in Food, and Should You Count Them? - Bulletproof 29.03.2022 · What are macros? Short for macronutrients, macros are the fat, protein and carbohydrates that make up food and help you create energy. You can find them called out on nutrition labels. When you count macros and adjust their ratios, you can use them to achieve health goals like weight management, to gain muscle or to get into ketosis.