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  • Title: Effect of gamma-linolenic acid on lipid metabolism in laying hens.
    Author: Furuse M, Okada R, Kita K, Asakura K, Okumura J.
    Journal: Comp Biochem Physiol A Comp Physiol; 1992; 101(1):167-9. PubMed ID: 1347726.
    Abstract:
    1. Single comb white leghorn laying hens were given diets with additional mould, Mucus circineloides, containing gamma-linolenic acid (GLA) at levels of 0, 2.59 and 5.06 g GLA/kg diet ad lib. for 2 weeks and serum lipid contents were determined in experiment 1. 2. Serum low density lipoprotein and chylomicron levels were significantly reduced with the increase of dietary GLA levels. Serum triglyceride and cholesterol tended to be lowered by dietary GLA, but not significantly different. 3. Effects of mould GLA and extracted oil GLA on the egg yolk cholesterol concentration and fatty acid composition were compared in experiment 2. Both mould GLA and extracted oil GLA diets containing 5.32 and 4.71 g GLA/kg diet were given ad lib. for 2 weeks. 4. Yolk cholesterol content was not affected by dietary GLA sources. Content of GLA in the yolk was not altered, although that of arachidonic acid was enhanced by dietary GLA supplementation, particularly by the extracted oil GLA. 5. It is suggested that GLA is rapidly metabolized to arachidonic acid in the body and incorporated into the yolk.
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