Table 7. Effect of the treatments on levels of TBARS (nmol/g tissue) in fresh and frozen breast muscles of broilers.

Breast muscle	Experimental group				SEM	P-value
(n=10)	P1	P2	P3	P4
Fresh	18.49	14.38	17.99	19.47	1.05	0.183
Frozen	33.30a	30.68a	30.04a	24.34b	0.72	0.014

Treatments: P1, control; P2, 0.5% β-alanine+0.24% MgO; P3, 0.25% L-histidine +0.24% MgO; P4, 0.20% β-alanine+0.10% L-histidine+0.24% MgO; ^{a, b}, P<0.05; SEM, standard error of treatment.