Recommendations for deficiency and inadequacy of 25-hydroxyvitamin D
| Endocrine Society3 | |
| Deficiency | < 20 ng/mL (< 50 nmol/L) |
| Insufficiency | 21–29 ng/mL (52.5–72.5 nmol/L) |
| Sufficiency | 30–100 ng/mL (75–250 nmol/L) |
| Institute of Medicine4 | |
| At risk for deficiency | < 12 ng/mL (< 30 nmol/L) |
| At risk of inadequacy | 12–19 ng/mL (30–49 nmol/L) |
| Sufficiency | 20–50 ng/mL (50–125 nmol/L) |
| Concentration of possible concern | > 50 ng/mL (> 125 nmol/L) |