What Is "If It Fits Your Macros" (IIFYM)?
Macro tracking (or flexible dieting) takes traditional calorie counting to the next level of precision. Rather than tracking an abstract calorie number, you ensure your calories come from an optimal balance of protein, carbohydrates, and dietary fats.
The Energy Densities of Macronutrients
- Protein (4 kcal/g): Essential for tissue repair, immune competence, and muscle synthesis.
- Carbohydrates (4 kcal/g): The primary high-energy fuel for high-intensity muscular contraction and central nervous system function.
- Fats (9 kcal/g): Crucial for steroid hormone synthesis (testosterone, estrogen), cell membrane integrity, and fat-soluble vitamin absorption (A, D, E, K).
3 Simple Steps to Start Today
- Calculate your total daily energy expenditure and macronutrient breakdown using our Macro Calculator.
- Purchase an inexpensive digital kitchen scale to measure foods in raw grams rather than subjective measuring cups.
- Log meals in your favorite tracking app, aiming to hit within ±5 to 10 grams of your daily targets.