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The effect of dietary fat on the fatty acid composition of lipids secreted in rats' milk

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Lipids

Abstract

During pregnancy and lactation, female rats were fed diets containing either 28% partially hydrogenated marine oil (28MO), 2% arachis oil (2AO), or no fat (FF). Milk lipid composition was examined by gas chromatographic analysis of the gastric content of 10-day-old suckling pups. An increase to 45% in the milk content of long chain monoenoic acids, 18∶1, 20∶1 and 22∶1, reflects the fatty acid composition of the marine oil. Milk fatty acids of medium chain length comprised 6%, 31% and 24% of total fatty acids in the (28MO), (2AO) and (FF) groups, respectively, suggesting that a high-fat diet (28MO) inhibits the lipid synthetic activity of mammary glands. The amount of dienoic C18-acids (6%) in the group fed (28MO) containing no essential fatty acids (EFA) was similar to the amount of 18∶2 in the group receiving a low-fat, EFA-rich diet (2AO). However, only half the dienoic acid from the milk of the (28MO)-fed animals was linoleic acid, which was most likely mobilized from fat depots.

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Authors and Affiliations

  1. Department of Biochemistry, Royal Danish School of Pharmacy, Universitetsparken 2, DK-2100, Copenhagen ø, Denmark

    Nanna Philipson Brandorff

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  1. Nanna Philipson Brandorff
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Brandorff, N.P. The effect of dietary fat on the fatty acid composition of lipids secreted in rats' milk. Lipids 15, 276–278 (1980). https://doi.org/10.1007/BF02535840

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  • DOI: https://doi.org/10.1007/BF02535840

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