Table 5. Effects of oral administration of whey protein (WP) on serum ghrelin, cholecystokinin (CCK)-8, secretin and duodenum α-amylase concentration in beef steers

Item	Treatment¹⁾		SEM²⁾	p-value³⁾
Item	Control	WP	SEM²⁾	p-value³⁾
Ghrelin (ng/mL)	2.161	2.044	0.58	0.331
CCK (ng/mL)	2.823	2.560	0.34	0.233
Secretin (ng/mL)	0.648	0.637	0.09	0.342
D. F α-amylase⁴⁾ (U/L)	16.043	16.429	0.50	0.384

Control, TMR 9 kg/d; WP, control with whey protein 400 g/d.
Standard error of mean.
p-values were calculated by paired t-test.
TMR, total mixed ration; CCK, cholecystokinin; D. F α-amylase, duodenum fluid α-amylase.