Accumulation of alpha-tocopherol in eggs enriched with omega3 and omega6 polyunsaturated fatty acids.
The objective of the present study was to evaluate the pattern of accumulation of alpha-tocopherol (alpha-Toc) in egg as a response to dietary supplementation with 200 mg/kg diet of alpha-tocopheryl acetate (alpha-TA) and whether the inclusion of dietary oils with different fatty acid (FA) composition affected this parameter. Forty hens were randomly distributed into two treatments resulting from the supplementation of a basal diet containing 200 mg/kg alpha-TA with either 5% linseed oil (LO) or sunflower oil (SO). alpha-Tocopherol concentration of eggs was measured at 0, 4, 9, 14, 19, and 50 d after inclusion of the experimental diets. Results show that alpha-Toc concentration in the egg increased after the 4th d of feeding, reaching its maximum level at 14 d (168 microg/g egg), after which it decreased 10 to 12% until 19 d, obtaining similar values at 50 d (145 microg/g egg). No differences were observed between dietary oils in the deposition pattern of alpha-Toc in the egg.
Galobart
J
J
Departament de Ciència Animal i dels Aliments, Facultat Veterinària, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain.
Barroeta
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AC
Cortinas
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L
Baucells
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MD
Codony
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R
D000818:Animals; D002645:Chickens / Q000378:metabolism*; D004042:Dietary Fats, Unsaturated / Q000008:administration & dosage*; D004531:Eggs / Q000032:analysis*; D015525:Fatty Acids, Omega-3 / Q000008:administration & dosage*; D043371:Fatty Acids, Omega-6; D005231:Fatty Acids, Unsaturated / Q000008:administration & dosage*; D005260:Female; D008043:Linseed Oil / Q000008:administration & dosage; D010938:Plant Oils / Q000008:administration & dosage; D000074242:Sunflower Oil; D013997:Time Factors; D024502:alpha-Tocopherol / Q000008:administration & dosage / Q000032:analysis*
D004042:Dietary Fats, Unsaturated; D015525:Fatty Acids, Omega-3; D043371:Fatty Acids, Omega-6; D005231:Fatty Acids, Unsaturated; D010938:Plant Oils; D000074242:Sunflower Oil; D008043:Linseed Oil; D024502:alpha-Tocopherol