. "6 Tolerable Upper Intake Levels: Calcium and Vitamin D." Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press, 2011.
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DRI Dietary Reference Intakes Calcium Vitamin D
TABLE 6-2 Calcium Tolerable Upper Intake Levels (UL) by Life Stage
Life Stage Group
UL
Infants
0 to 6 mo
1,000 mg
6 to 12 mo
1,500 mg
Children
1–3 y
2,500 mg
4–8 y
2,500 mg
Males
9–13 y
3,000 mg
14–18 y
3,000 mg
19–30 y
2,500 mg
31–50 y
2,500 mg
51–70 y
2,000 mg
> 70 y
2,000 mg
Females
9–13 y
3,000 mg
14–18 y
3,000 mg
19–30 y
2,500 mg
31–50 y
2,500 mg
51–70 y
2,000 mg
> 70 y
2,000 mg
Pregnancy
14–18 y
3,000 mg
19–30 y
2,500 mg
31–50 y
2,500 mg
Lactation
14–18 y
3,000 mg
19–30 y
2,500 mg
31–50 y
2,500 mg
Using these same data, Sargent et al. (1999) later reported on calcium excretion measures, and this measure serves as the UL indicator for infants. This 1999 report has provided the ability to estimate a NOAEL for calcium intake for infants based on calcium excretion. Within the confines of the limitations of the data, they suggest that infants can tolerate approximately 1,750 mg of calcium per day with no noted adverse effects. A NOAEL of 1,750 mg/day is therefore established for infants on this basis.
Infants 0 to 6 Months of Age
The presumed sensitivity of the young infant to excess intakes of any substance, as well as the lack of direct evidence to clarify the nature of adverse effects for this group, warrants a cautious approach. Quantitative factors relative to metabolic differences between younger infants and older
