Abstract
Vitamin D insufficiency and deficiency can be diagnosed with measurements of serum 25-hydroxyvitamin D (25OHD). Most vitamin D is derived from sunlight (80%), so serum 25OHD levels are lowest in late winter and early spring. Dietary vitamin D in North America is small, about 100 to 200 IU daily. A recent review of the literature shows many association studies relating vitamin D deficiency and insufficiency to several diseases. Large randomized trials of vitamin D are underway and soon there may be answers as to whether vitamin D is clinically effective and what level of serum 25OHD is necessary.
Original language | English (US) |
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Pages (from-to) | 871-884 |
Number of pages | 14 |
Journal | Endocrinology and Metabolism Clinics of North America |
Volume | 46 |
Issue number | 4 |
DOIs | |
State | Published - Dec 2017 |
Keywords
- IOM
- RDA for vitamin D
- Vitamin D supplementation
ASJC Scopus subject areas
- Endocrinology, Diabetes and Metabolism
- Endocrinology