Table 1.

Deficiency cut-off levels of micronutrients (in serum)

	Age group	Sex	Cut-off levels	Reference
Calcium	6–16 years	Male and Female	<10⋅0 mg/dl	(18)
Iron			<70⋅0 μg/dl	(19, 20)
Selenium			<5⋅5 μg/dl	(21)
Zinc	<10 years	Male and Female	<65⋅0 μg/dl	(22)
	≥10 years	Male	<70⋅0 μg/dl
	≥10 years	Female	<66⋅0 μg/dl
Vitamin A	6–16 years	Male and Female	<20⋅0 μg/dl	(23)
25-Hydroxy vitamin D			<12⋅0 ng/ml	(15)
Folate			<3⋅0 ng/ml	(24)
Vitamin B12			<203.0 pg/ml	(15)