Balanced diet should have approximately

A balanced diet requires a specific proportion of macronutrients to maintain health and provide energy. According to standard nutritional guidelines, carbohydrates should constitute the largest portion of the diet, typically ranging from 45% to 65% of total caloric intake [1]. This aligns with the proportion of 3/5 (60%). Proteins and fats are required in smaller, roughly equal proportions. The Acceptable Macronutrient Distribution Range (AMDR) suggests protein intake should be between 10% and 35%, and fat intake between 20% and 35%. The ratio of 1/5 (20%) for protein and 1/5 (20%) for fat falls within these recommended ranges. Research indicates that a diet with approximately 50–60% carbohydrates, 20–30% protein, and 30% fat is optimal for reducing all-cause mortality and supporting physiological functions. Thus, the 1/5 protein, 1/5 fat, and 3/5 carbohydrate distribution is the most accurate representation of a balanced diet.

Sources

1. [1] https://pmc.ncbi.nlm.nih.gov/articles/PMC7589789/