epidemic of poor vitamin D status among 9-12 years old children in Tehran, 2008, using HPLC: need for an urgent action

ABSTRACT

Background and Objectives: vitamin D deficiency/insufficiency is a global health problem. The importance of this problem is doubled in growing children because of their increased need for skeletal growth. This investigation was performed firstly to assess vitamin D status, and secondly to examine its possible relationship with sex, residing area and duration of sun exposure in 9-12 years old children of Tehran