Table 2.

Different vitamin D cut-offs used in clinical practice.

	Vitamin D
Source	Deficiency	Insufficiency	Sufficiency
IOM (2010) [16]	30 nmol/L	30–50 nmol/L	75–250 nmol/L
U.S Endocrine Society (2011) [17]	50 nmol/L	50–75 nmol/L	75–250 nmol/L
SIOMMS (2016) [18]	<25 nmol/L	25–50 nmol/L	50–80 nmol/L
AME (2018) [19]			>75 nmol/L in patients at risk of bone disease