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The recommendation that a significant portion of the daily diet should consist of carbohydrates aligns with established dietary guidelines. Specifically, these guidelines suggest that 45-65% of total daily caloric intake should come from carbohydrates. This range is based on carbohydrates serving as a primary source of energy for the body, especially for the brain and during physical activity.

Carbohydrates are essential for providing energy necessary for daily functions and exercise, as well as for maintaining proper metabolic processes. They are broken down into glucose, which is the body's preferred source of fuel. By consuming carbohydrates within this recommended percentage, individuals can support their energy needs and overall health effectively.

The other ranges provided fall outside this recommended percentage, indicating insufficient or excessive carbohydrate intake, which may not adequately support energy needs or could lead to other nutritional imbalances. Thus, sticking to the 45-65% guideline helps ensure a balanced intake for optimal performance and health.