Updates on the Status of Vitamin D as a Risk Factor for Respiratory Distress Syndrome

Table 1

Recommendations for vitamin D level in human.

No	Vitamin D level	Institute of medicine classification [14]	Endocrine society classification [15]	Pediatric endocrine society classification [16]
1	Toxicity (ng/mL)	—	>150	>150
2	Risk of toxicity (ng/mL)	>50	—	>100
3	Insufficiency (ng/mL)	—	21–29	15–20
4	Sufficiency (ng/mL)	<20	>30	20–100
5	Deficiency (ng/mL)	<15	<20	<15
6	Severe deficiency (ng/mL)	<5	—	<5