. 2023 Jul 22;60(2):2023018. doi: 10.2141/jpsa.2023018

Table 3. Effect of dietary Gracilaria lemaneiformis polysaccharides (GLPs) on antioxidant activities of broiler chickens at 42 days of age.

Items	GLP level (mg/kg)				SEM	P-value
Items	0	1000	2000	4000	SEM	Linear	Quadratic
Serum
SOD,U/mL	136.78^bc	143.52^b	169.55^a	153.42^ab	1.745	0.028	0.013
GSH-Px,U/mL	204.21	216.44	228.36	221.39	2.214	0.102	0.239
CAT, U/mL	4.78^b	6.32^a	8.32^a	7.43^a	0.258	0.024	0.378
MDA, nmol/mL	6.39^a	4.27^b	3.66^b	4.89^b	0.322	0.005	0.043
Liver
SOD, U/mg	319.32	321.41	332.63	335.79	1.874	0.127	0.316
GSH-Px, U/mg	4.59^bc	5.89^ab	6.88^a	6.59^a	0.017	0.024	0.089
CAT, U/mg	4.41^b	5.53^ab	6.37^a	7.11^a	0.014	0.019	0.038
MDA, nmol/mg	5.45^a	3.74^b	2.57^b	3.48^b	0.163	0.035	0.011

^a,b,c Means within rows with different superscript letters differ significantly (P < 0.05), whereas values with no letters or the same superscript letters are not significantly different (P > 0.05).

SOD, superoxide dismutase; GSH-Px, glutathione peroxidase; CAT, catalase; MDA, malondialdehyde; SEM, standard error of the mean.