Table 2.

Vitamin D dietary reference intakes by life stage

Life-stage group	RDA (intake that covers needs of ≥ 97.5% of population)		Serum 25OHD level (corresponding to the RDA)*
	IU/d	mcg/d	ng/ml
Infants (0–12 months)	400**	10**	20
1–70 yr	600	15	20
+ 70 yr	800	20	20
Pregnant	600	15	20
Lactating	600	15	20

The Recommended Dietary Allowances (RDAs) covering requirements by life stage

RDA , Recommended Dietary Allowance; IU , International Unit

*Measures of serum 25(OH)D levels corresponding to the RDA and covering the requirements of at least 97.5% of the population

**Reflects adequate intake reference value rather than RDA. RDAs have not been established for infants