Macros — short for macronutrients — are the three categories of nutrients your body needs in large amounts: protein, carbohydrates, and fats. They're the building blocks of every diet, and understanding how to balance them is one of the most useful skills in nutrition.
Protein: The Muscle Builder
Protein provides 4 calories per gram and is made of amino acids, the building blocks of muscle tissue. It's the most satiating macro, keeping you full longer than carbs or fat. For anyone strength training, adequate protein is non-negotiable. Current research suggests 1.6-2.2g per kg bodyweight per day. Best sources: eggs, chicken breast, fish, Greek yogurt, cottage cheese, and legumes.
Carbohydrates: The Fuel Source
Carbs provide 4 calories per gram and are your body's preferred energy source for high-intensity activity. Your muscles store carbs as glycogen for quick energy during exercise. Your carb needs depend on activity level — a sedentary person needs far fewer than someone training hard five days a week. Adjust based on training: more carbs on heavy training days, fewer on rest days.
Fats: Hormones and Absorption
Fat provides 9 calories per gram, making it the most calorie-dense macro. Dietary fat is essential for hormone production (including testosterone), vitamin absorption (A, D, E, K), and cell membrane health. Aim for 0.8-1g per kg bodyweight daily. Prioritize unsaturated fats from olive oil, nuts, avocados, and fatty fish.
Finding Your Ratio
There's no single macro split that works for everyone. A reasonable starting point: 30% protein, 40% carbs, 30% fat. Athletes often benefit from more carbs. Adjust based on your results and how you feel.