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Associations among Human Milk Polyunsaturated Fatty Acids and Infant Sleep Patterns: A Cross-Sectional Study.

Ana M Palacios1, Dominick J Lemas2, Bridget E Young3

  • 1Department of Health Policy and Community Health, Jiann Ping Hsu College of Public Health, Georgia Southern University, Savannah, GA, United States.

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Summary

Higher levels of omega-3 and omega-6 polyunsaturated fatty acids (PUFAs) in human milk were linked to longer daytime sleep in exclusively breastfed infants. These findings highlight the importance of fatty acid composition for infant sleep patterns.

Keywords:
ALALALCPUFAPUFAhuman milkinfantinfant sleepomega-3omega-6polyunsaturated fatty acids

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Area of Science:

  • Human milk composition
  • Infant sleep science
  • Nutritional biochemistry

Background:

  • Infant sleep is crucial for development and long-term health.
  • Diet-sleep connections are known, but human milk fatty acids' role is understudied.
  • Polyunsaturated fatty acids (PUFAs) are vital components of human milk.

Purpose of the Study:

  • To investigate the association between PUFAs in human milk and infant sleep patterns.
  • Focus on 2-month-old infants exclusively fed human milk.
  • Examine specific omega-3 and omega-6 fatty acids.

Main Methods:

  • Cross-sectional analysis of data from a lactation cookie trial.
  • 131 parent-infant dyads provided human milk samples and sleep data.
  • Multivariate linear models adjusted for key infant and maternal factors.

Main Results:

  • Higher proportions of omega-3 and omega-6 PUFAs in human milk correlated with increased total infant sleep.
  • Specifically, alpha-linolenic acid (ALA) and linoleic acid (LA) showed positive associations with sleep duration.
  • These fatty acids were significantly linked to longer diurnal sleep, but not nocturnal sleep.

Conclusions:

  • Elevated omega-3 and omega-6 PUFAs, including ALA and LA, in human milk are associated with more daytime sleep in 2-month-old infants.
  • Further research is warranted to understand mechanisms and long-term effects.
  • Clinical trial registration: NCT04805008.