Table 2. Effect of dietary Fe concentration and source on Fe concentration of feed, feces and plasma in weanling pigs

Item	Inorganic (ppm)	HME (ppm)			Organic (ppm)	SEM	p-value
Item	100	50	75	100	100	SEM	p-value
Phase I (d 14)
Feed (mg/kg)	173^a	130^c	151^b	177^a	171^a	4.32	0.001
Feces (mg/kg)	268^a	221^c	245^b	267^a	266^a	4.67	0.001
Plasma (ug/dL)	103^ab	92^b	102^ab	108^a	106^a	1.79	0.027
Phase II (d 28)
Feed (mg/kg)	176^a	131^c	154^b	174^a	172^a	4.10	<0.001
Feces (mg/kg)	260^a	217^d	232^c	245^b	254^ab	3.77	<0.001
Plasma (ug/dL)	114^ab	96^b	108^ab	116^a	114^ab	2.22	<0.001
Liver	238^a	217^b	245^a	252^a	242^a	6.01	0.004

Values with different superscripts of the row significantly differ (p < 0.05).
HME, hot melt extrusion; SEM, standard error of means.