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Fatty acid and sn-2 fatty acid composition in human milk from Granada (Spain) and in infant formulas

Abstract

Objective: To investigate differences in fatty acid and sn-2 fatty acid composition in colostrum, transitional and mature human milk, and in term infant formulas.

Setting: Departament de Nutrició i Bromatologia, University of Barcelona, Spain and University Hospital of Granada, Spain.

Subjects: One-hundred and twenty mothers and 11 available types of infant formulas for term infants.

Design: We analysed the fatty acid composition of colostrum (n=40), transitional milk (n=40), mature milk (n=40) and 11 infant formulas. We also analysed the fatty acid composition at sn-2 position in colostrum (n=12), transitional milk (n=12), mature milk (n=12), and the 11 infant formulas.

Results: Human milk in Spain had low saturated fatty acids, high monounsaturated fatty acids and high linolenic acid. Infant formulas and mature human milk had similar fatty acid composition. In mature milk, palmitic acid was preferentially esterified at the sn-2 position (86.25%), and oleic and linoleic acids were predominantly esterified at the sn-1,3 positions (12.22 and 22.27%, respectively, in the sn-2 position). In infant formulas, palmitic acid was preferentially esterified at the sn-1,3 positions and oleic and linoleic acids had higher percentages at the sn-2 position than they do in human milk.

Conclusion: Fatty acid composition of human milk in Spain seems to reflect the Mediterranean dietary habits of mothers. Infant formulas resemble the fatty acid profile of human milk, but the distribution of fatty acids at the sn-2 position is markedly different.

Sponsorship: This study was supported by a research grant from the Spanish Technological and Industrial Development Centre (CDTI) of the Ministry of Education and Science, working in collaboration with Laboratorios Ordesa S.L., Spain.

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Acknowledgements

The authors are grateful to Mr Robin Rycroft for reviewing the English of typescript and to all the mothers who took part in the study. Special thanks to Ana Medina for her advice.

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López-López, A., López-Sabater, M., Campoy-Folgoso, C. et al. Fatty acid and sn-2 fatty acid composition in human milk from Granada (Spain) and in infant formulas. Eur J Clin Nutr 56, 1242–1254 (2002). https://doi.org/10.1038/sj.ejcn.1601470

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