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Infants' exposure to aluminum from vaccines and breast milk during the first 6 months

José G Dórea1, Rejane C Marques

  • 1Department of Nutrition, Universidade de Brasília, Brasília, DF, Brazil. dorea@rudah.com.br

Journal of Exposure Science & Environmental Epidemiology
|December 17, 2009
PubMed

Insights

Infants receive high aluminum exposure from vaccines, far exceeding breast milk levels. Further research is needed on long-term neurodevelopmental effects of early-life exposure to vaccine adjuvants and preservatives.

Area of Science:

  • Pediatrics
  • Toxicology
  • Immunology

Background:

  • Vaccination programs have led to increased vaccine administration in newborns and infants.
  • Early-life exposure to environmental toxins, including metals, is a concern for neuro-cognitive development.
  • Current infant immunization schedules include aluminum (adjuvant) and historically thimerosal (preservative).

Purpose of the Study:

  • To assess early-life exposure to aluminum from vaccines in exclusively breastfed infants.
  • To compare vaccine-derived aluminum exposure with levels from breast milk.
  • To highlight the need for studying long-term neurodevelopmental effects of early exposure to neurotoxins in vaccines.

Main Methods:

  • Quantified aluminum exposure in exclusively breastfed infants receiving a full immunization schedule in Brazil.
  • Compared calculated aluminum intake from vaccines with estimated absorption from breast milk.

Main Results:

  • Exclusively breastfed infants showed significantly higher aluminum exposure from vaccines (225–1750 μg/dose) compared to breast milk (2.0 μg).
  • This highlights a substantial difference in aluminum exposure routes for infants.

Conclusions:

  • The study emphasizes the need for further investigation into the long-term effects of early-life exposure to aluminum and ethylmercury from vaccines on infant neurodevelopment.
  • It calls for a pragmatic approach to vaccine safety that considers the unique vulnerabilities of fetuses, neonates, and infants.
  • Research should address the potential impact of low-level neurotoxin exposure, traditionally considered safe, on the developing central nervous system.

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