Understanding Macronutrients: Protein, Carbs, and Fats Breakdown

While total calories dictate whether your body gains or loses weight, macronutrients (macros) determine whether that weight change comes from body fat or lean skeletal muscle tissue.

The Big Three Macronutrients

1. Protein (4 kcal per gram)

• The building block of muscle tissue, cellular enzymes, and neurotransmitters.
• Highest thermic effect of food (burns 20-30% of its energy just during digestion).
• Promotes the highest satiety, keeping hunger suppressed during fat loss phases.

2. Carbohydrates (4 kcal per gram)

• The body's preferred fast fuel source, stored as glycogen in liver and muscle tissue.
• Essential for high-intensity athletic performance, anaerobic weight training, and cognitive energy.

3. Dietary Fats (9 kcal per gram)

• Essential for hormone production (including testosterone and estrogen), cell membrane integrity, and fat-soluble vitamin absorption (vitamins A, D, E, K).
• More than double the caloric density of protein and carbs.

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