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  • Title: The levels of essential unsaturated fatty acids in human milk on the 3rd, 4th, 5th, and 6th days after labour.
    Author: Okolska G, Ziemlański S, Kowalska M, Ostojska J.
    Journal: Acta Physiol Pol; 1983; 34(2):239-48. PubMed ID: 6666610.
    Abstract:
    The composition of fatty acids in human milk lipids was determined in 41 women on the 3rd, 4th, 5th and 6th days after labour by the method of gas chromatography. In these investigations no significant differences were demonstrated in the fatty acids in the lipid fractions between these consecutive days. The level of polyunsaturated fatty acids of the n-6 and n-3 groups was about 11.9-13.6%, including linoleic acid (18:2, n-6) about 7.7-9.8%, and alpha-linolenic acid (18:3, n-3) about 0.7-1%. In the analysis group of n-6 fatty acids the determined acids were: linoleic acid (18:2, n-6), gamma-linolenic acid (18:3, n-6), eicosadienoic acid (20:2, n-6), eicosatrienoic acid (20:3, n-6), arachidonic acid (20:4, n-6), docosahexaenoic acid (22:6, n-6). From the group of n-3 acids the identified ones were: alpha-linolenic acid (18:3, n-3), eicosapentaenoic acid (20:5, n-3), docosapentaenoic acid (22:5, n-3) and docosahexaenoic acid (22:6, n-3). The obtained quotients of fatty acids n-6 through n-3 on the consecutive days were: 7.2:1-7.8:1, indicating a too low level of the n-3 acids in the investigated milk. The acids prevailing in human milk lipids were: oleic (18:1, n-9) and palmitic (16:0) which accounted for 37-39% and 25-26% respectively. The polyunsaturated to saturated fatty acid ratio (P:S) ranged from 0.28 to 0.33.
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