AI Article Synopsis
- The study investigated how the fatty acid composition in breast milk relates to mothers' diets and its implications for infant growth.
- Breast milk samples were analyzed from lactating women, revealing significant correlations between certain nutrients (like zinc and vitamins) and unsaturated fatty acids in breast milk.
- Findings indicated that increased intake of nuts and specific dietary nutrients positively influenced the fatty acid profile in breast milk, which in turn was linked to better growth indicators in infants at 12 months.
Article Abstract
Objectives: The fatty acid (FA) composition of breast milk is a relevant aspect related to the development of the lactating infant. The present study aimed at exploring correlations between dietary intake of macro- and micronutrients with the FA profile in breast milk, and the possible implication for infants' growth.
Study Design: Breast milk samples from a cohort of lactating women were collected 7-15 days postpartum. The FA profiles in triacylglycerol (TAG) and phospholipid (PL)-rich fractions were analyzed by gas chromatography. Diet was registered during the third trimester of pregnancy by means of a food frequency questionnaire (FFQ). In addition, anthropometric measurements of infants were collected from gestation and up to 12 months postpartum.
Results: The FA profile in breast milk was characterized by a median of 37.4, 41.3 and 16.8% of saturated, monounsaturated, and polyunsaturated FAs, respectively. From the dietary components, zinc, iron, and B group vitamins were correlated positively with the proportion of total n-3 FAs in TAG and C20:5 n-3 in PL. Lycopene, vitamin E, zinc, and vitamin B2 showed a similar correlation with total polyunsaturated fatty acid (PUFA), total n-6 FAs, C20:4 n-6, and C18:2 n-6 in TAG. Regarding food groups, nuts showed the strongest association with several PUFA both in TAG and PL, while the vegetable group was also positively associated with C18:3 n-3. Furthermore, the concentration of linolenic acid (C18:3 n-3) and palmitic acid (C16:0) were positively associated with increased length for age (LFA) and weight for age (WFA) at 12 months compared with birth [ΔLFA -0.16 (-0.85, 0.37); ΔWFA -0.26 (-0.77, 0.21)].
Conclusions: Mothers' intake of nuts, dietary sources of zinc, iron, and B group vitamins were identified as potential predictors of a high-unsaturated FA profile in breast milk. In addition, linolenic and palmitic acids in breast milk were positively associated with infants' growth in the first year of life.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9296781 | PMC |
| http://dx.doi.org/10.3389/fnut.2022.854786 | DOI Listing |
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