Table 6. Effect of combined supplementation of catechin and vitamin C supplementation on stress index in liver of broilers during high temperature

Vitamin C (mg/kg)	0			250			SEM	P-value¹
Catechin (mg/kg)	0	600	1,200	0	600	1,200	SEM	C	V	C × V
HSP70 (ng/protein 10 mg)	38.89^a	37.38^ab	35.95^bc	36.70^bc	34.82^c	36.60^bc	0.321	0.033	0.019	0.047
MDA content (nmol/protein g)	122.32^a	111.78^a	115.31^a	108.70^ab	97.48^b	95.08^b	2.342	0.045	<0.001	0.744

Means in same rows with different superscripts are significantly different (P<0.05).
C, catechin; V, vitamin C; C × V, catechin × vitamin C.
HSP70, heat shock protein 70; MDA, malondialdehyde.
SEM, standard error of means.