Vitamin D intakes in North America and Asia-Pacific countries are not sufficient to prevent vitamin D insufficiency

J Steroid Biochem Mol Biol. 2007 Mar;103(3-5):626-30. doi: 10.1016/j.jsbmb.2006.12.067. Epub 2007 Jan 10.

Abstract

Worldwide, vitamin D status is suboptimal relative to circulating levels of 25-hydroxyvitamin D (25OHD) needed to prevent a variety of chronic conditions, however, it has long been assumed that dietary intake is sufficient to meet needs when sun exposure is limited. In the USA, mean vitamin D intake from foods is close to 5 microg, the Dietary Reference Intake (DRI) recommendation for persons up to 50 years; however, the amount of vitamin D needed to maintain a sufficient 25OHD level during winter is >12.5 microg, and that needed for darkly pigmented, veiled, or sun protected persons is >50 microg. In the USA, most vitamin D intake from foods is provided by fortification. Canada and New Zealand have fewer fortified choices, and intakes are correspondingly lower. Supplement use can increase mean intake to >12.5 microg but does not always reach those who need it most. Serum 25OHD levels in New Zealand reveal much more insufficiency than expected, especially for Pacific people and Mäori; low serum 25OHD concentrations are seen throughout the Asia-Pacific region. Fortification and supplementation may be effective to achieve intakes of 12.5 microg vitamin D in some of the population, but for many achieving the amount needed in the absence of skin synthesis requires intakes above the current upper level for vitamin D of 50 microg.

MeSH terms

  • Asia / epidemiology
  • Diet
  • Female
  • Humans
  • Male
  • North America / epidemiology
  • Pacific Islands / epidemiology
  • Vitamin D / therapeutic use*
  • Vitamin D Deficiency / blood
  • Vitamin D Deficiency / drug therapy*
  • Vitamin D Deficiency / epidemiology

Substances

  • Vitamin D