Table 1.

Diagnostic cut‐off points for 25‐hydroxy‐cholecalciferol concentrations 12, 13

Category	nmol l–1	μg l–1
Deficiency	<50	<20
Insufficiency	51–74	21–29
Sufficient	>75	>30
Excess	>250	>100
Intoxication	>375	>150