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The effect of dietary fat on the fatty acid composition of lipids secreted in rats' milk
Author(s) -
Brandorff Nanna Philipson
Publication year - 1980
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02535840
Subject(s) - lipidology , clinical chemistry , food science , composition (language) , chemistry , milk fat , fatty acid , dietary fat , biochemistry , linseed oil , linguistics , philosophy
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 C 18 ‐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.