PMID: 3751158Jun 1, 1986Paper

Biochemistry of human milk in early lactation

Zeitschrift für Ernährungswissenschaft
G HarzerJ G Bindels

Abstract

With the analysis of more than 550 human milk samples we showed that triglycerides (accounting for 96-99% of the total lipids) increased from 2 to 3.5 g/100 ml mainly during the first week postpartum and remained constant thereafter. In contrast, both cholesterol and vitamin E concentrations decreased from 35 to 20 mg/100 ml and from 1.7 to 0.30 mg/100 ml, respectively. The phospholipids remained constant (40 mg/100 ml). Also the fatty acid composition of total lipids changed. Mid chain fatty acids (C10, C12, C14) increased, whereas the long chain polyunsaturated fatty acids decreased. The P/S-ratio of 0.32 remained constant throughout lactation. The mean protein content of human milk decreased from approximately 2 g/100 ml at day 2 to approximately 1 g/100 ml at day 36 of lactation. The content of each individual amino acid decreased likewise. However, when we expressed the amino acid values in relation to the protein value--that is as g amino acid per g protein--some decreased, some remained constant and some increased indicating a changing protein pattern. From these data we computer-calculated a sharp decrease in IgA content, a moderate decrease for lactoferrin and constant values for casein and a-Lactalbumin. Throughout th...Continue Reading

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Dec 1, 1988·Zeitschrift für Ernährungswissenschaft·G Kynast, C Schmitz
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May 31, 2018·Advances in Nutrition·Daphna K Dror, Lindsay H Allen

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