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  • Title: Breast milk composition in Ethiopian and Swedish mothers. II. Lactose, nitrogen, and protein contents.
    Author: Lönnerdal B, Forsum E, Gebre-Medhin M, Hambraeus L.
    Journal: Am J Clin Nutr; 1976 Oct; 29(10):1134-41. PubMed ID: 973602.
    Abstract:
    Breast milk from underprivileged and privileged Ethiopian mothers was collected at different stages of lactation and analyzed for total nitrogen, nonprotein nitrogen, lactose, and individual milk proteins (lactoferrin, alpha-lactalbumin, serum albumin, IgG and IgM). These values and the milk volume of one meal were compared to corresponding results from well-nourished Swedish mothers. No significant differences between the levels of these constituents or the milk volumes were found between the two groups of Ethiopian mothers. When comparison was made between breast milk from these two Ethiopian groups and the Swedish group, the former two showed significantly higher values for the iron-binding protein lactoferrin. Protein composition of milk from mothers belonging to 2 different socioeconomic groups in Ethiopia was studied and is compared with results obtained earlier based on well-nourished Swedish women's milk (these were considered normal data). Breast milk from different stages of lactation were analyzed for total nitrogen, nonprotein nitrogen, lactose, and milk proteins (lactoferrin, alpha-lactalbumin, serum albumin, immunoglobulin G and IgM). Between the 2 Ethiopian groups, characterized as privileged or not, as a nutrition index, there were no significant differences in levels of any milk constituents or milk volume. However, when the Ethiopian data were combined and compared with Swedish data, the Ethiopian group had significantly higher values for the iron-binding protein lactoferrin (P about .001). All Swedish data were characterized as from privileged women.
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