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Serum 25-hydroxyvitamin D [25(OH)D] concentrations and health
| nmol/L | ng/mL | Health status |
|---|---|---|
| < 30 | < 12 | Vitamin D deficiency, leading to rickets in infants and children and osteomalacia in adults |
| 30 to < 50 | 12 to < 20 | Vitamin D insufficiency |
| ≥ 50 | ≥ 20 |
Generally considered adequate for the bone and overall health in healthy individuals |
| > 125 | > 50 |
Emerging evidence links potential adverse effects to such high levels, particularly >150 nmol/L (>60 ng/mL) |
