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Nutrients 2018, 10(12), 1893; https://doi.org/10.3390/nu10121893

Breast Milk Macronutrient Components in Prolonged Lactation

1
Neonatology Department, Wroclaw Medical University, Borowska 213, 50-556 Wroclaw, Poland
2
Department of Chemistry and Immunochemistry, Wroclaw Medical University, Bujwida 44a, 50-345 Wroclaw, Poland
*
Author to whom correspondence should be addressed.
Received: 4 October 2018 / Revised: 20 November 2018 / Accepted: 22 November 2018 / Published: 3 December 2018
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Abstract

Human milk (HM) is the first dietary exposure in infancy and the best nutritional option for growth and healthy development of the newborn and infant. The concentrations of macronutrients, namely proteins, carbohydrates and lipids, change during lactation stages. HM has been studied extensively in the first 6 months of lactation, but there are limited data regarding milk composition beyond 1 or 2 years postpartum. The aim of our study was to describe longitudinal changes in HM macronutrient concentrations during the prolonged lactation of healthy mothers from the 1st to the 48th month. For the macronutrient content of milk of mothers breastfeeding for longer than 18 months, fat and protein increased and carbohydrates decreased significantly, compared with milk expressed by women breastfeeding up to 12 months. Moreover, the concentration of fat, protein and carbohydrates in HM over 2 years of lactation from the 24th to the 48th month remained at a stable level. However, analyzed macronutrients were positively (carbohydrate, r = 0.51) or negatively (fat, r = −0.36 and protein, r = −0.58) correlated with the amount of feeding. Our results create a greater potential for understanding the nutritional contribution of HM over 2 years of lactation and showed that the source of calories in breast milk for older children is mainly fat, while carbohydrates play a greater role in infant nutrition in the early stage. The observed changes of macronutrient concentrations from the 1st to the 48th month of lactation are probably related to the adaptation of milk composition to the increased energy demand of the intensively growing child. View Full-Text
Keywords: breastfeeding; macronutrients; prolonged lactation; child nutrition breastfeeding; macronutrients; prolonged lactation; child nutrition
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Czosnykowska-Łukacka, M.; Królak-Olejnik, B.; Orczyk-Pawiłowicz, M. Breast Milk Macronutrient Components in Prolonged Lactation. Nutrients 2018, 10, 1893.

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