Effect of vitamin E supplementation on fatty acid composition of muscle and adipose tissues of indoor lambs with special attention on rumen-derived trans monounsaturated fatty acids |
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Authors: | V Berthelot L Broudiscou P Schmidely |
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Affiliation: | 1. AgroParisTech, UMR 791 MoSAR, 16 rue Claude Bernard, F-75005 Paris, France;2. INRA, UMR 791 MoSAR, 16 rue Claude Bernard, F-75005 Paris, France |
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Abstract: | Thirty male lambs were assigned to one of 3 concentrate diets supplemented with 45 (E0), 286 (E1) or 551 (E2) mg/kg DM of dl-α-tocopheryl acetate to test the effect of vitamin E supplementation on muscle, caudal and perirenal fatty acid (FA) compositions. Specific attention was paid to C18:1 10t, usually observed in high proportions with high-starch or high-unsaturated FA diets. Vitamin E supplementation increased the α-tocopherol plasma concentrations of lambs. It did not modify lamb growth and slaughter parameters. Vitamin E supplementation did not modify FA composition in most tissues but it increased the C18:2 n − 6/C18:3 n − 3 ratio in muscle and adipose tissues of the E1 group compared to E0 and E2 groups. Vitamin E supplementation enhanced the C18:1 10t proportion in muscle and adipose tissues and it decreased the C18:2 9c,11t proportion in adipose tissues, especially in the E2 group. These changes may not be favourable for the nutritional value of lamb meat. |
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Keywords: | Vitamin E Muscle Fatty acid composition Trans fatty acids Lamb |
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