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Effect of lecithin on jejunal absorption of micellar lipids in man and on their monomer activity in vitro

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Lipids

Abstract

The effect of lecithin on jejunal absorption of fatty acids and octadecenoylglycerol was studied in healthy volunteers with a jejunal perfusion system which excluded pancreatic and biliary secretions from the test segment. Lecithin significantly reduced the absorption of oleic acid (P<0.05) and octadecenoylglycerol (P<0.01), while it had no effect on the absorption of ricinoleic acid. In vitro, lecithin reduced monomer activities of all three lipids; the changes were greater for oleic acid and octadecenoylglycerol than for ricinoleic acid (P<0.02). From these data it is concluded that lecithin reduces monomer activity of fatty acids in mixed micellar solutions and that it can thereby reduce the absorption rates of micellar lipids. Intact lecithin is not absorbed under these conditions. Maldigestion of lecithin in pancreatic insufficiency may, therefore, aggravate the steatorrhea observed in this condition.

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Authors and Affiliations

  1. Gastroenterology Unit, Mayo Clinic and Mayo Foundation, 55901, Rochester, Minnesota

    H. V. Ammon, P. J. Thomas & S. F. Phillipis

  2. Gastroenterology Section, Medical Service, Veterans Administration Center, 53193, Wood (Milwaukee), Wisconsin

    H. V. Ammon, P. J. Thomas & S. F. Phillipis

  3. Department of Medicine, The Medical College of Wisconsin, 53233, Milwaukee, Wisconsin

    H. V. Ammon, P. J. Thomas & S. F. Phillipis

Authors
  1. H. V. Ammon
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  2. P. J. Thomas
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  3. S. F. Phillipis
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Ammon, H.V., Thomas, P.J. & Phillipis, S.F. Effect of lecithin on jejunal absorption of micellar lipids in man and on their monomer activity in vitro. Lipids 14, 395–400 (1979). https://doi.org/10.1007/BF02533424

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  • DOI: https://doi.org/10.1007/BF02533424

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