Approximate calcium balance in a typical infant receiving 120 kcal/kg per day intake

	Calcium concentration (mg/dL)	Intake (mg/kg per day)	Absorption (percent)	Total absorption (mg/kg per day)	Approximate retention (mg/kg per day)
Human milk*	25	38	60	25	15 to 20
Preterm formula/fortified human milk	145	220	50 to 60	120 to 130	100 to 120

* Human milk assumed to be 20 kcal/oz, and preterm formula and fortified human milk assumed to be 24 kcal/oz.

Graphic 90620 Version 14.0

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