In general, macros (short for macronutrients) are the molecules that our bodies use for energy (aka calories) ---They include protein, carbohydrates, and fat. They are found in all foods in varying amounts.
Carbohydrates provide 4 calories per gram
Protein provides 4 calories per gram
Fat provides 9 calories per gram
Download my free Macronutrient Guidebook if you want help figuring out which foods have what macros and tips for hitting your targets.
Some people have started counting macros, instead of calories; because when you count macros, it's not about how many calories are in your food, it's about what kind. Research now shows that all calories are not created equal and our bodies use each macronutrient in different ways.
Each macronutrient goes through different pathways...