Recommended Dietary Reference Intakes* for Some Macronutrients, Food and Nutrition Board, Institute of Medicine of the National Academies
Category | Age or Time Frame (year) | Protein (g/kg) | Energy(kcal/kg) | Calcium (mg/kg) | Phosphorus (mg/kg) | Magnesium (mg/kg) |
|---|---|---|---|---|---|---|
Infants | 0.0–0.5 | 2.2 | 108.3 | 66.7 | 50.0 | 6.7 |
0.5–1.0 | 1.6 | 94.4 | 66.7 | 55.6 | 6.7 | |
Children | 1–3 | 1.2 | 100.0 | 61.5 | 61.5 | 6.2 |
4–6 | 1.2 | 90.0 | 40.0 | 40.0 | 6.0 | |
7–10 | 1.0 | 71.4 | 28.6 | 28.6 | 6.1 | |
Males | 11–14 | 1.0 | 55.6 | 26.7 | 26.7 | 6.0 |
15–18 | 0.9 | 45.5 | 18.2 | 18.2 | 6.1 | |
19–24 | 0.8 | 40.3 | 16.7 | 16.7 | 4.9 | |
25–50 | 0.8 | 36.7 | 10.1 | 10.1 | 4.4 | |
51+ | 0.8 | 29.9 | 10.4 | 10.4 | 4.5 | |
Females | 11–14 | 1.0 | 47.8 | 26.1 | 26.1 | 6.1 |
15–18 | 0.8 | 40.0 | 21.8 | 21.8 | 5.5 | |
19–24 | 0.8 | 37.9 | 20.7 | 20.7 | 4.8 | |
25–50 | 0.8 | 34.9 | 12.7 | 12.7 | 4.4 | |
51+ | 0.8 | 29.2 | 12.3 | 12.3 | 4.3 | |
Pregnant | — | 0.9 | 4.6 | 18.5 | 18.5 | 4.9 |
Breastfeeding | 1st year | 1.0 | 7.9 | 19.0 | 19.0 | 5.4 |
* These amounts, expressed as average daily intakes over time, are intended to provide for individual variations among most healthy people living in the United States under usual environmental stresses. Adapted from U.S. Department of Agriculture and U.S. Department of Health and Human Services. Dietary Guidelines for Americans, 2020-2025. 9th Edition. December 2020. Available at DietaryGuidelines.gov and Heymsfield SB, Shapses SA. Guidance on Energy and Macronutrients across the Life Span. N Engl J Med. 2024;390(14):1299-1310. doi:10.1056/NEJMra2214275. | ||||||