Table 5. Antioxidant activity in serum of birds fed experimental diets at day 28¹

Item	Experimental diets		SEM²	P-value
Item	Control	Allium hookeri	SEM²	P-value
Superoxide dismutase (U/mL)	11.797	11.879	1.2025	0.9626
Catalase (U/mL)	9.554	8.538	0.5254	0.2016
Glutathione peroxidase (U/L)	29.991	31.631	1.1156	0.3232
Malondialdehyde (μmol/L)	12.208	12.845	1.5495	0.5587
Nitric oxide (μmol/L)	60.355	36.798	13.2293	0.3256

Each value represents mean of 6 replicates.
SEM, standard error of the mean.