title: Dose and duration effect of alpha-tocopheryl acetate supplementation on chicken meat fatty acid composition, tocopherol content, and oxidative status.
abstract: The effects of dietary alpha-tocopheryl acetate (alpha-TA) doses (75, 150, and 225 mg/kg) and the duration of this supplementation (0, 10, 21, 32, and 43 days prior to slaughter) on fatty acid composition, alpha-tocopherol content, and oxidative status were studied either in raw or in cooked dark chicken meat with its skin. With regard to fatty acid composition, raw meat was affected by both dietary factors. Various polyunsaturated fatty acids decreased as a result of higher alpha-TA doses, whereas these fatty acids increased with longer supplementation periods. Cooked meat showed similar trends for the duration of alpha-TA supplementation. On the other hand, alpha-tocopherol content in raw and cooked meat increased as a result of the dose and duration of alpha-TA supplementation. Formation of lipid hydroperoxides and thiobarbituric acid values of these meats were also influenced by these two dietary factors, and the dietary combination of 150 mg/kg of alpha-TA during the last 32 days was optimal in terms of supplementation costs and meat oxidative stability.
authors.affiliation: Nutrition and Food Science Department-CeRTA, Faculty of Pharmacy, University of Barcelona, Avinguda Joan XXIII s/n, 08028 Barcelona, Spain. ricard_bou@ub.edu
authors.forename: Ricard
authors.initials: R
authors.lastname: Bou
authors.forename: Stella
authors.initials: S
authors.lastname: Grimpa
authors.forename: Maria D
authors.initials: MD
authors.lastname: Baucells
authors.forename: Rafael
authors.initials: R
authors.lastname: Codony
authors.forename: Francesc
authors.initials: F
authors.lastname: Guardiola
mesh_terms: D000818:Animals; D002645:Chickens; D004032:Diet; D019587:Dietary Supplements; D005227:Fatty Acids / Q000032:analysis*; D005260:Female; D008054:Lipid Peroxides / Q000032:analysis; D008460:Meat / Q000032:analysis*; D010084:Oxidation-Reduction; D017392:Thiobarbituric Acid Reactive Substances / Q000032:analysis; D024505:Tocopherols; D024502:alpha-Tocopherol / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000032:analysis*
chemical_list: D005227:Fatty Acids; D008054:Lipid Peroxides; D017392:Thiobarbituric Acid Reactive Substances; D024502:alpha-Tocopherol; D024505:Tocopherols