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Current definitions of vitamin D status based on 25(OH)D levels
| Definition | Equivalent 25(OH)D3 serum level (UK) | Equivalent 25(OH)D3 serum level (US) | Notes |
|---|---|---|---|
| Vitamin D toxic | >375 nmol/l | >150 ng/l | (69) |
| Vitamin D sufficient | >75 nmol/l | >30 ng/ml | |
| Vitamin D insufficient | 50–75 nmol/l | 20–30 ng/ml | |
| Vitamin D deficient | <50 nmol/l | <20 ng/ml | Recent increase in threshold from <11 ng/ml has led to an estimated increase in prevalence from 2-14% (70) |
