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NIH-funded study links natural sugars in breastmilk to early childhood height and weight

February 18, 2020

WHAT:

Human milk oligosaccharides (HMOs) found in breastmilk may influence a child's growth from infancy through early childhood, according to a study supported by the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), part of the National Institutes of Health (NIH). The study also suggested that maternal obesity may affect HMO composition in breastmilk. The study was led by Lars Bode, Ph.D., at the University of California, San Diego. It appears in The American Journal of Clinical Nutrition.

HMOs are complex sugars found in breastmilk, but infants do not digest them directly. Instead, HMOs serve as prebiotics by influencing the composition of the gut microbiome. Previous studies have found that HMOs may also protect infants from disease-causing microbes. Approximately 150 types of HMOs are known, and mothers have unique combinations and concentrations of them in their breastmilk, influenced in part by genetics and the types of HMO-processing enzymes they have.

Researchers evaluated approximately 800 pairs of mothers and children in a Finnish study of child development. The researchers analyzed the content of HMOs in breastmilk samples (collected when the children were 3 months old), among them two HMOs that are now added to some commercial infant formulas: 2'-fucosyllactose (2'FL) and lacto-N-neo-tetraose (LNnT).

Breastmilk from mothers of taller and heavier infants and children tended to have less diverse HMO composition, higher concentrations of 2'FL and lower concentrations of LNnT. Breastmilk from overweight and obese mothers also tended to have less diverse HMO composition, higher concentrations of 2'FL and lower concentrations of LNnT.

According to the authors, these results confirm findings of two of their previous smaller studies. Together, the three studies found similar patterns of HMO composition and child growth among three different groups of mothers. The authors noted that, although their study linked HMO composition with early childhood growth, it couldn't prove that variations in HMO patterns cause differences in children's growth. If additional studies confirm their findings, specific HMOs might one day provide a treatment for early childhood growth problems and obesity.
-end-
WHO:

Andrew Bremer, M.D. Ph.D., chief of NICHD's Pediatric Growth and Nutrition Branch, which funded this research, is available for interviews.

REFERENCE:

Lagström H, Rautava S, Ollila H, Kaljonen A, Turta O, Mäkelä J, Yonemitsu C, Gupta J, and Bode L. Associations between human milk oligosaccharides and growth in infancy and early childhood. The American Journal of Clinical Nutrition DOI: 10.1093/ajcn/nqaa010 (2020)

About the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD): NICHD leads research and training to understand human development, improve reproductive health, enhance the lives of children and adolescents, and optimize abilities for all. For more information, visit https://www.nichd.nih.gov.

About the National Institutes of Health (NIH): NIH, the nation's medical research agency, includes 27 Institutes and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and rare diseases. For more information about NIH and its programs, visit https://www.nih.gov.

NIH/Eunice Kennedy Shriver National Institute of Child Health and Human Development

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