Which macronutrient has the smallest recommended percentage range in the listed dietary guidelines?

• A. Carbohydrates 55-60%
• B. Fats 25-30%
• C. Proteins 15-20%
• D. Vitamins 5-10%

Answer: (C)

Understanding how energy is distributed among macronutrients is essential in athletic nutrition. Carbohydrates and fats provide most of the daily energy and are typically given larger percentage ranges, while protein has a smaller share because its main role is repairing and building tissue, not fueling workouts as the primary source. Among the options, carbohydrates are listed at 55-60% and fats at 25-30%, both higher than the protein range of 15-20%. Vitamins are micronutrients and aren’t expressed as a percentage of total calories, so they don’t belong in the macronutrient comparison. Therefore, the smallest recommended percentage range among the macronutrients shown is protein at 15-20%.