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Long-chain polyunsaturated fatty acids in breast milk in La Plata, Argentina: relationship with maternal nutritional

M C Marín1, A Sanjurjo, M A Rodrigo

  • 1Carrera del Investigador (CONICET), Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET-UNLP, Facultad de Ciencias Médicas, Calles 60 y 120 (1900) La Plata, Argentina. mmarin@atlas.med.unlp.edu.ar

Prostaglandins, Leukotrienes, and Essential Fatty Acids
|September 1, 2005
PubMed

Insights

Maternal nutrition impacts breast milk fatty acids. Obese mothers had higher polyunsaturated fatty acids (PUFAs), but all mothers showed a concerningly high n-6/n-3 ratio and low docosahexaenoic acid (DHA).

Area of Science:

  • Human Nutrition
  • Public Health
  • Infant Nutrition

Background:

  • Milk fat is crucial for infant energy and development, supplying essential polyunsaturated fatty acids (PUFAs).
  • Maternal nutritional status significantly influences milk composition, yet data on PUFA status in Southern vulnerable populations is scarce.
  • Understanding these relationships is vital for optimizing infant health outcomes.

Purpose of the Study:

  • To investigate the association between maternal nutritional status (normal, overweight, obese) and the fatty acid profile of breast milk.
  • To assess the levels of specific fatty acids, including n-6 and n-3 PUFAs, and their ratios in relation to maternal body mass index.
  • To compare milk fatty acid composition with international standards.

Main Methods:

  • Maternal nutritional status was determined using body mass index (BMI).
  • Milk samples were analyzed for protein, total lipid, and detailed fatty acid composition.
  • Statistical comparisons were made between maternal nutritional status groups.

Main Results:

  • Maternal nutritional status did not affect milk protein content.
  • Obese mothers exhibited increased milk lipid content, linoleic acid, total n-6, and total PUFAs compared to normal or overweight mothers.
  • Across all groups, a high n-6/n-3 fatty acid ratio and low docosahexaenoic acid (22:6n-3) content were observed, differing from international benchmarks.

Conclusions:

  • Maternal obesity is linked to higher PUFA content in breast milk, but not necessarily a healthier profile.
  • The consistently high n-6/n-3 ratio and low DHA in breast milk highlight potential nutritional deficiencies for infants in this population.
  • Public health interventions are urgently needed to promote dietary changes among nursing mothers to improve milk fatty acid composition.

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