Question

Which of the following nutrients should contribute the most calories in a balanced diet?

• A. Proteins
• B. Fats
• C. Carbohydrates
• D. Vitamins

Hint:

Carbohydrates are the body's main fuel source. For energy needs, think “Carbs First” — ideally whole grains, fruits, and vegetables.

Answer 1

The Correct Option is C

A balanced diet includes all essential nutrients in appropriate proportions to meet the body's energy and nutritional needs.
Among the major nutrients, carbohydrates are the primary source of energy.
They are broken down into glucose, which the body uses for immediate energy or stores as glycogen.
Carbohydrates provide 4 kilocalories per gram, and in a typical balanced diet, they should contribute about 50–60% of the total calorie intake.
Now let’s look at the other options:
- Proteins provide 4 kcal/g, but their main function is growth and repair, not as the primary energy source.
- Fats provide 9 kcal/g, which is more energy-dense, but they should be consumed in moderation (about 20–30% of daily calories).
- Vitamins do not provide calories but are crucial for metabolic processes.
Hence, carbohydrates should provide the majority of calories in a balanced diet.