Grape pomace (GP) is a source of polyphenols
with powerful antioxidant capacity. An experiment
was conducted to investigate the effect of inclusion
of GP at levels of 5, 15, and 30 g/kg and α-tocopheryl
acetate (200 mg/kg) in a corn-soybean basal diet on
growth performance, protein and amino acid digestibilities;
antioxidant activity of diet, serum and excreta, lipid
oxidation of breast and thigh meats during refrigerated
storage, and liver vitamin E concentration. Growth performance
and protein and amino acid digestibilities were
not affected among the different treatments. Total intake
and digestibility of extractable polyphenols in the birds
fed the GP diet were increased compared with birds fed
supplemented and unsupplemented vitamin E diets. Antioxidant
activity in vitamin E and GP diets and excreta
exhibited higher scavenging free radical capacity than the
control diet using 3-ethylbenzthiazoline-6-sulfonic acid
and ferric reducing antioxidant power methods. Lipid
oxidation (malondialdehyde concentration) in breast and
Grape pomace (GP) is a source of polyphenols
with powerful antioxidant capacity. An experiment
was conducted to investigate the effect of inclusion
of GP at levels of 5, 15, and 30 g/kg and α-tocopheryl
acetate (200 mg/kg) in a corn-soybean basal diet on
growth performance, protein and amino acid digestibilities;
antioxidant activity of diet, serum and excreta, lipid
oxidation of breast and thigh meats during refrigerated
storage, and liver vitamin E concentration. Growth performance
and protein and amino acid digestibilities were
not affected among the different treatments. Total intake
and digestibility of extractable polyphenols in the birds
fed the GP diet were increased compared with birds fed
supplemented and unsupplemented vitamin E diets. Antioxidant
activity in vitamin E and GP diets and excreta
exhibited higher scavenging free radical capacity than the
control diet using 3-ethylbenzthiazoline-6-sulfonic acid
and ferric reducing antioxidant power methods. Lipid
oxidation (malondialdehyde concentration) in breast and
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