Key Takeaway: Tracking macros ensures that the weight you lose comes from body fat rather than lean muscle, and gives you the energy needed for high physical performance.
What Are Macronutrients?
Every calorie in your food comes from three primary macronutrients:
- Protein: 4 calories per gram. Essential for muscle repair, immune function, and satiety.
- Carbohydrates: 4 calories per gram. The primary fuel for high-intensity exercise and brain function.
- Dietary Fats: 9 calories per gram. Vital for hormone synthesis, vitamin absorption (A, D, E, K), and cellular membrane integrity.
How to Calculate Your Grams
If your daily target is 2,000 kcal and you want a 40/35/25 split:
- Protein (40%): 800 kcal / 4 = 200g
- Carbs (35%): 700 kcal / 4 = 175g
- Fats (25%): 500 kcal / 9 = 56g
Easily calculate yours with our free Macro Split Calculator.
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Scientific References & Clinical Studies
- International Society of Sports Nutrition Position Stand: diets and body composition — J Int Soc Sports Nutr, 2017
Related Nutrition Guides & Tools
High Protein Foods for Weight Loss: Satiety & Muscle
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Carbs vs Fats: Which Should You Cut for Weight Loss?
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