Table 1.

The fat-soluble vitamin-level reference value [15]

Vitamin D (ng/mL)	Deficiency	< 20
	Insufficiency	< 30
Vitamin A (ng/mL)	1–6 age	2–4,3
	7–12 age	2,6–4,9
	13–19 age	2,6–7,2
Vitamin E (mcg/mL)	1–12 age	3–9
	13–19 age	6–10
Vitamin K1 (pg/ml)		100–2200