Table 1.

Serum 25(OH) D concentration^[14]

25(OH) D concentration	25(OH) D status
$\le$ 10 ng/mL	Severe deficiency
10–20 ng/mL	Mild deficiency
20–30 ng/mL	Insufficient
30 $\le$ ng/mL	Adequate
100 $\le$ ng/mL	Potential toxicity