What are Macros? (IIFYM)

Macronutrients ("macros" for short) are the three major nutrients that make up the caloric content of all food: Protein, Carbohydrates, and Fats. "If It Fits Your Macros" (IIFYM) is a popular dietary framework where no foods are off-limits, provided they fit into your daily gram targets.

The Three Pillars

• Protein (4 calories/gram): The building block of muscle. Critical for recovery and retaining muscle mass during a weight loss phase. It is also the most highly satiating (filling) macronutrient.
• Carbohydrates (4 calories/gram): Your body's preferred and primary energy source. High carb diets fuel intense athletic performance.
• Fats (9 calories/gram): Essential for hormone regulation and absorption of vital vitamins. Note that fats are more than double the caloric density of carbs and protein.