title: Effect of micellized natural (D-α-tocopherol) vs. synthetic (DL-α-tocopheryl acetate) vitamin E supplementation given to turkeys on oxidative status and breast meat quality characteristics.
abstract: This study evaluates the effect of vitamin E supplementation source (micellized natural vs. the synthetic form) and dosage (40, 80, or 120 mg/kg) on α-tocopherol concentration in plasma and muscle, antioxidant capacity, and breast meat quality in turkeys. Three hundred female turkeys were randomly selected at an average live weight 63.2 g±0.5 and distributed into 7 groups. One group (control) was fed a standard diet without vitamin E supplementation and the other 6 were given mixed diets supplemented with the natural (d-α-tocopherol) or synthetic (dl-α-tocopheryl acetate) form of vitamin E in 3 dosages (40, 80, or 120 mg/kg). Following 11 wk feeding, results showed that performance parameters were not modified either by source or dosage of vitamin E supplementation to the turkeys. Plasma and muscle α-tocopherol at d 9 of refrigerated storage were higher when turkeys were supplemented with the natural form at higher doses. Losses in the concentration of α-tocopherol in meat between the beginning and the end of the 9 d refrigerated storage were greater in the groups supplemented with the synthetic form of vitamin E compared to those receiving the natural supplementation. The relationship between plasma α-tocopherol and the Trolox equivalent antioxidant capacity followed a different trend depending on the vitamin E source. Intramuscular fat was not significantly affected by the vitamin E source supplementation; however the slope of the linear regression equation was lower for the natural form than for the synthetic form. Turkeys given the natural form had higher C18:1n-9 but lower C15:1, C17:1, C20:5n-3, and C22:6n-3 in breast muscle. Meat samples from turkeys supplemented with natural vitamin E had higher deoxymyoglobin at d 3, 6, and 9 and lower metmyoglobin at d 9 of refrigerated storage than those receiving the synthetic form. Dietary supplementation with medium doses (80 mg/kg) micellized d-α-tocopherol is an interesting feeding strategy for ensuring antioxidant status and improving meat quality.
authors.affiliation: Dpto. Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n., 28040 Madrid, Spain anarey@vet.ucm.es.
authors.forename: A I
authors.initials: AI
authors.lastname: Rey
authors.affiliation: Dpto. Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n., 28040 Madrid, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Segura
authors.affiliation: Dpto. Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n., 28040 Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Olivares
authors.affiliation: Instituto Valenciano de Investigaciones Agrarias, Centro de Investigación y Tecnología Animal. Polígono Industrial La Esperanza, 100. Apartado 187. 12400 Segorbe, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Cerisuelo
authors.affiliation: PigChamp Pro Europa, Carretera de San Rafael, 68, 40006 Segovia.
authors.forename: C
authors.initials: C
authors.lastname: Piñeiro
authors.affiliation: Dpto. Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n., 28040 Madrid, Spain.
authors.forename: C J
authors.initials: CJ
authors.lastname: López-Bote
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D003116:Color; D004032:Diet / Q000662:veterinary*; D019587:Dietary Supplements / Q000032:analysis; D004305:Dose-Response Relationship, Drug; D005227:Fatty Acids / Q000378:metabolism; D005260:Female; D063427:Food Quality; D008460:Meat / Q000032:analysis / Q000592:standards*; D010369:Pectoralis Muscles / Q000502:physiology; D011897:Random Allocation; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism; D014422:Turkeys / Q000378:metabolism*; D014810:Vitamin E / Q000378:metabolism*; D014815:Vitamins / Q000378:metabolism*; D024502:alpha-Tocopherol / Q000097:blood / Q000378:metabolism*
chemical_list: D000975:Antioxidants; D005227:Fatty Acids; D017392:Thiobarbituric Acid Reactive Substances; D014815:Vitamins; D014810:Vitamin E; D024502:alpha-Tocopherol
keywords: color stability; fatty acid; natural α-tocopherol; oxidative status; turkey meat quality