Research
Micronutrients & recovery
Vitamin D deficiency is defined as serum 25(OH)D below 20 ng/ml, and insufficiency as 21-29 ng/ml, with sufficiency targeted above 30 ng/ml for optimal bone health.
Your Vitamin D status is categorized as deficient if your blood level is below 20 ng/ml, insufficient between 21-29 ng/ml, and sufficient above 30 ng/ml. These levels determine whether you need supplementation.
WeakSupportsHIGH confidence
Vitamin D deficiency is defined as a 25(OH)D below 20 ng/ml (50 nmol/liter), and vitamin D insufficiency as a 25(OH)D of 21–29 ng/ml (525–725 nmol/liter). ... to raise the blood level of 25(OH)D consistently above 30 ng/ml (75 nmol/liter) may require at least 1000 IU/d of vitamin D.
Why this rating
Based on strong recommendation (1) and high quality evidence (QQQQ).
Source
Evaluation, Treatment, and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline
Michael F. Holick et al. · The Journal of Clinical Endocrinology & Metabolism · 2011
clinical_guidelineCited 10,424×
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