Normal Reference Ranges
Adult
30 - 100 ng/mL
Pediatric
30 - 100 ng/mL
Clinical Significance
Essential for bone health and calcium absorption. 25-OH Vitamin D is the best indicator of overall Vitamin D stores.
Causes of High
- Excessive supplementation/toxicity
Causes of Low
- Lack of sun exposure
- Malabsorption (Celiac, IBD)
- Chronic kidney disease
- Severe liver disease