Lipid and protein oxidation of alpha-linolenic acid-enriched pork during refrigerated storage as influenced by diet supplementation with olive leaves (Olea europea L.) or alpha-tocopheryl acetate

Abstract

The objective of this study was to evaluate the effect of diet supplementation with olive leaves or alpha-tocopheryl acetate on lipid and protein oxidation of raw and cooked n-3 enriched-pork during refrigerated storage. Enrichment of pork with alpha-linolenic acid through diet supplementation with linseed oil enhanced (p <= 0.05) lipid oxidation in both raw and cooked chops but had no effect (p>0.05) on protein oxidation during refrigerated storage while decreasing (p <= 0.05) the sensory attributes of cooked pork. Diet supplementation with olive leaves or alpha-tocopheryl acetate had no effect (p>0.05) on the fatty acid composition of pork but decreased (p <= 0.05) lipid oxidation while exerting no effect (p>0.05) on protein oxidation in both raw and cooked alpha-linolenic acid-enriched chops stored and chilled for 9 days. Moreover, olive leaves and alpha-tocopheryl acetate supplemented at 10 g/kg and 200 mg/kg diet, respectively, exerted (p <= 0.05) a beneficial effect on the sensory attributes of cooked alpha-linolenic acid-enriched pork chops. (C) 2012 Elsevier Ltd. All rights reserved.