Table 4.
Definition of Vitamin D status (25(OH)D concentration) by different health authorities.
| Health organization | Optimal | Insufficiency | Deficiency | Reference |
|---|---|---|---|---|
| Endocrine Society | ≥30 ng/mL (75 nmol/L), preferred range: 40–60 ng/mL | 21–29 ng/mL | ≤20 ng/mL (50 nmol/L) | [48] |
| The Institute of Medicine (Health and Medicine Division of the National Academies) | ≥20 ng/mL | 12–20 ng/mL | <12 ng/mL | [49] |
| The American Association of Clinical Endocrinologists | 30–50 ng/mL | 20–29 ng/mL | <20 ng/mL | [50] |
| Mayo Clinic | >20 ng/mL | 11–20 ng/mL | ≤10 ng/mL | [51] |
| Danish Health Authority | 20–64 ng/mL (50–160 nmol/L) | 10–20 ng/mL (25–50 nmol/L) | <10 ng/mL (25 nmol/L) | [52] |
| ECTS working group | ≥20 ng/mL (50 nmol/L) | N/A | <20 ng/mL (50 nmol/L) Severe: <12 ng/mL (30 nmol/L) |
[53] |
25(OH)D concentration is given in ng/mL (1 nmol/L = 0.4 ng/mL).