AMDRs

AMDRs, or Acceptable Macronutrient Distribution Ranges, are guidance for the proportion of daily energy that should come from the three macronutrients: carbohydrates, protein, and fat. They are part of the dietary reference intakes developed to help people meet nutrient needs while lowering the risk of chronic disease. AMDRs are intended for healthy individuals and are used to inform dietary planning and nutrition labeling, among other applications. They are not strict limits but flexible ranges that can be adjusted for age, sex, life stage, activity level, and medical considerations.

The commonly cited AMDRs specify: carbohydrates 45-65% of daily energy, protein 10-35%, and fat 20-35%. These ranges are expressed as percentages of total daily calories. In practical terms, on a 2000-calorie diet, carbohydrates would typically provide about 900–1300 kcal (roughly 225–325 g), protein about 200–700 kcal (roughly 50–175 g), and fat about 400–700 kcal (roughly 44–78 g). The exact gram amounts depend on the energy density (carbohydrates and protein provide about 4 kcal per gram, fat about 9 kcal per gram).

Development and use: AMDRs are part of the broader dietary reference intake framework established by nutrition authorities such as the Institute of Medicine. They help balance macronutrient intake to support health and reduce disease risk, while allowing individual customization based on needs and preferences.