What percentage of daily calories should carbohydrates constitute?

Carbohydrates should constitute 45-65% of daily calorie intake primarily because they are the body's main source of energy. They play a crucial role in fueling physical activity and are particularly important for high-intensity exercise, where glucose is needed for quick energy. Additionally, carbohydrates are essential for proper brain function, as the brain relies heavily on glucose.

The recommended percentage reflects balanced dietary guidelines that support overall health, performance, and energy levels. This range allows for sufficient energy provision while also accommodating various dietary preferences and needs. It recognizes the importance of not only the quantity of carbohydrates consumed but also the quality, encouraging the intake of nutrient-dense sources such as whole grains, fruits, and vegetables.

The other options suggest either too low or somewhat restrictive carbohydrate intake levels, which may not provide adequate energy for most individuals, particularly those who are active. A balanced approach, as represented by 45-65%, supports optimal health and performance for a broad range of populations.