Table 6.

Effects of different proportions of naturally oxidized corn oil on serum lipid metabolism of broilers.

	Oxidized corn oil: non-oxidized corn oil
Parameter	0:100	25:75	50:50	75:25	100:0	SEM	P-value	P-linear	P-quadratic
AST (U/L)	117.04d	115.24d	197.96a	157.86b	136.10c	5.89	<0.001	<0.001	<0.001
ALT (U/L)	30.62	30.26	31.01	30.64	28.64	0.68	0.849	0.484	0.468
TC (mmol/L)	2.65	2.70	2.85	2.69	2.76	0.03	0.400	0.368	0.342
TG (mmol/L)	1.60a	1.41ab	0.85c	1.20b	1.22b	0.06	0.001	0.237	0.063
HDL (mmol/L)	1.20	1.18	1.25	1.20	1.23	0.01	0.539	0.489	0.837
LDL (mmol/L)	1.21	1.30	1.28	1.25	1.26	0.01	0.353	0.729	0.141
FFA (umol/L)	298.17c	322.59bc	366.78ab	393.96a	375.24ab	11.38	0.032	0.004	0.229

Abbreviations: ALT, alanine aminotransferase; AST, aspartate aminotransferase; FFA, free fatty acid; HDL, high-density lipoprotein; LDL, low-density lipoprotein; TC, total cholesterol; TG, triglyceride.

^a-dDifferent letters in the same row indicate significant differences (P < 0.05), and the same letter means no significant difference (P > 0.05).