. 2021 Dec 6;8:726770. doi: 10.3389/fnut.2021.726770

Table 6.

Effects of dietary Se sources on serum antioxidant and immune capacity of laying hens.

Items¹	Ctrl	Norm	SS	SEY	SEIP	SEM	P-value
Week 6
GSH-Px, U/mL	744.75^b	745.22^b	752.80^b	764.35^a	766.34^a	3.13	<0.01
SOD, U/mL	177.18^c	181.18^c	194.04^b	210.52^a	217.42^a	3.44	<0.01
T-AOC, U/mL	9.72^c	9.61^c	10.10^b	10.63^a	10.55^a	0.12	<0.01
MDA, nmol/mL	5.49^a	5.32^a	4.96^b	4.62^c	4.39^c	0.11	<0.01
IgG, g/L	4.40	4.19	4.28	4.22	4.31	0.08	0.36
IgA, g/L	2.20	2.08	2.14	2.10	2.16	0.05	0.57
Week 12
GSH-Px, U/mL	723.75	728.76	762.49	758.78	751.55	21.86	0.63
SOD, U/mL	180.01^c	188.52^c	193.82^bc	209.03^ab	216.17^a	5.61	<0.01
T-AOC, U/mL	9.04	9.67	11.22	11.05	10.07	0.61	0.09
MDA, nmol/mL	5.06	5.04	4.92	4.81	5.34	0.18	0.30
IgG, g/L	4.38^bc	4.18^c	4.69^b	4.82^ab	5.01^a	0.11	<0.01
IgA, g/L	2.01^c	2.08^bc	2.12^abc	2.23^ab	2.24^a	0.06	0.04

^{a, b, c}

Means within a row with no common superscripts differ significantly (P < 0.05).

Data are the mean of eight replicates; GSH-Px, glutathione peroxidase; SOD, superoxide dismutase; T-AOC, total antioxidant capacity; MDA, malondialdehyde; SEM, standard error of mean; Ctrl, the birds fed the basal diet; Norm, the birds fed 0.3 mg/kg of Se provided by sodium selenite; SS, SEY, and SEIP, the birds fed 2 mg/kg of Se provided by sodium selenite, Se yeast, and Se-rich insect protein powder, respectively.