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TABLE 7-2 Vitamin D Dietary Reference Intakes by Life Stage (amount/day)

Life Stage Group

AI

EAR

RDA

UL

Infants

 

 

 

 

0 to 6 mo

400 IU (10 µg)

1,000 IU (25 µg)

6 to 12 mo

400 IU (10 µg)

1,500 IU (38 µg)

Children

 

 

 

 

1–3 y

400 IU (10 µg)

600 IU (15 µg)

2,500 IU (63 µg)

4–8 y

400 IU (10 µg)

600 IU (15 µg)

3,000 IU (75 µg)

Males

 

 

 

 

9–13 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

14–18 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

19–30 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

31–50 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

51–70 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

> 70 y

400 IU (10 µg)

800 IU (20 µg)

4,000 IU (100 µg)

Females

 

 

 

 

9–13 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

14–18 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

19–30 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

31–50 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

51–70 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

> 70 y

400 IU (10 µg)

800 IU (20 µg)

4,000 IU (100 µg)

Pregnancy

 

 

 

 

14–18 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

19–30 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

31–50 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

Lactation

 

 

 

 

14–18 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

19–30 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

31–50 y

400 IU (10 µg)

600 IU (15 µg)

4,000 IU (100 µg)

NOTE: AI = Adequate Intake; EAR = Estimated Average Requirement; IU = International Units; RDA = Recommended Dietary Allowance; UL = Tolerable Upper Intake Level.

groups. Persons in the 95th percentile for total intake did not appear to exceed the UL for their group.

The comparison between vitamin D intake estimates and serum 25OHD concentrations is worthy of note, but it is important to recognize that this comparison, although interesting, is somewhat problematic because the only possible comparison is based on group means, rather than on data linked to individuals. Moreover, as pointed out previously (IOM, 2000; Dwyer et al., 2003), estimates of intake tend to reflect an underestimation. With these caveats, the comparison is presented in Table 7-3. Shown are the average intakes for the various life stage groups, along with the average serum 25OHD levels for those life stage groups. For this table, serum 25OHD concentration data from the 2005 to 2006 surveys were used rather



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