Macronutrients

The four macros — protein, carbohydrates, fats, fiber — do fundamentally different jobs in your body. Treating “calories” as the only number that matters misses why two diets with the same calorie count can feel completely different and produce different results.

These guides cover what each macro actually does, how much of each most people need, the gap between food-label numbers and what your body absorbs, and the practical math for protein targets, fiber floors, and how saturated vs. unsaturated fats really differ.