Table 5.

Blood plasma total antioxidant capacity (TAC) and concentration of protein, triglycerides, cholesterol and glucose of 42-d-old broiler chickens.

Item	Treatments1			SEM2	Statistical Analysis3
	PFA-0	PFA-100	PFA-150		ANOVA	Polynomial Contrasts
					P-value	Plinear	Pquadratic
TAC, mmol TE/L4	10.4a	10.9ab	13.0b	1.14	0.048	0.031	0.461
Protein, g/dL	6.8	7.3	7.6	0.64	0.445	0.214	0.835
Triglycerides, mg/dL	33.2	33.6	28.6	4.62	0.549	0.445	0.437
Glucose, mg/dL	267.1	320.2	298.7	13.81	0.074	0.167	0.064
Cholesterol, mg/dL	118.0	105.4	138.3	22.30	0.073	0.153	0.068

PFA = phytogenic feed additive; TAC = total antioxidant capacity; TE = trolox equivalents.

^a,b Means with different superscripts within the same row differ significantly (P ≤ 0.05). Data represent treatment means from n = 10 replicate floor pens per treatment.

¹PFA-0 (basal diet with no PFA addition), PFA-100 (basal diet containing 100 mg PFA/kg diet), PFA-150 (basal diet containing 150 mg PFA/kg diet).

²Pooled standard error of means.

³The statistical analysis tests the differences between treatments (ANOVA) and the linear and quadratic effect of PFA inclusion levels (Polynomial contrasts).

⁴Total antioxidant capacity data were expressed as concentration of TE (mmol/L of plasma).