Vitamin D status: United States, 2001-2006.

The Institute of Medicine (IOM) recently released new dietary reference intakes for calcium and vitamin D. The IOM defined four categories of vitamin D status based on serum 25-hydroxyvitamin D (25OHD): (i) risk of deficiency, (ii) risk of inadequacy, (iii) sufficiency, and (iv) above which there may be reason for concern. This brief presents the most recent national data on vitamin D status in the U.S. population based on these IOM categories. Results are presented by age, sex, race and ethnicity, and, for women, by pregnancy and lactation status. All material appearing in this report is in the public domain and may be reproduced or copied without permission; citation as to source, however, is appreciated.