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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



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