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Dietary fat modulates dl-α-tocopheryl acetate (vitamin E) bioavailability in adult cockerels

Abstract : A trial was designed to assess the effect of fat supplementation (amount and type of fatty acids) on vitamin E bioavailability in adult cockerels. A total of 60 birds were force-fed three different diets: a semi-purified diet without added fat (Control diet) or supplemented with 3% fat as linseed (Linseed diet) or hydrogenated coconut oil (Coconut diet). The three experimental diets were also supplemented with dl-alpha-tocopheryl acetate to provide 40mg vitamin E per bird. After oneweek of depletion, blood was collected from the wing vein before (baseline) and 6, 12, 24 and 96h after the gavage. Plasma samples were analysed for their alpha-tocopherol, cholesterol and triglycerides concentrations. Results showed that the addition of 3% fat in the experimental diet increased post-gavage plasma alpha-tocopherol response by 153% for Linseed diet and by 75% for Coconut diet (P<0.0001) compared to the Control group. Furthermore, the plasma alpha-tocopherol response observed with the Linseed diet was 44% greater than that observed with the Coconut diet (P<0.0001). There was no effect of treatments on either plasma triglycerides (P=0.91) or cholesterol (P=0.45) responses. In conclusion, this study shows that the addition of 3% fat to the diet significantly increases dl-alpha-tocopheryl acetate bioavailability in adult cockerels. Supplementation of fat rich in unsaturated fatty acids also leads to a higher dl-alpha-tocopheryl acetate bioavailability than fat rich in saturated fatty acids.
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Contributor : Patrick Borel Connect in order to contact the contributor
Submitted on : Tuesday, February 28, 2017 - 10:36:29 AM
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P. Prévéraud, E. Devillard, P. Borel. Dietary fat modulates dl-α-tocopheryl acetate (vitamin E) bioavailability in adult cockerels. British Poultry Science, Taylor & Francis, 2015, 56 (1), pp.94 - 102. ⟨10.1080/00071668.2014.982074⟩. ⟨inserm-01478402⟩



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