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Isoflavones, soy-based infant formulas, and relevance to endocrine function

K O Klein1

  • 1Department of Clinical Science, A.I. duPont Hospital for Children, Wilmington, DE 19899, USA.

Nutrition Reviews
|August 11, 1998
PubMed
Summary

Soy infant formula is a safe and nutritionally complete option for most babies. Decades of research show no evidence of endocrine effects or impacts on growth, puberty, or fertility in humans.

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Area of Science:

  • Pediatrics
  • Nutrition Science
  • Endocrinology

Background:

  • Soy-based infant formulas have been used globally for over 60 years.
  • These formulas provide essential nutrients for infant growth and development.
  • Recent concerns question the safety of soy isoflavones due to potential endocrine effects observed in animal and cell studies.

Purpose of the Study:

  • To evaluate the safety of soy-based infant formulas, specifically addressing concerns about isoflavone endocrine effects.
  • To review existing scientific literature on human infants consuming soy-based formulas.

Main Methods:

  • Literature review of controlled clinical research and human studies on soy-based infant formula consumption.
  • Analysis of data regarding infant growth, pubertal development, and fertility.

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Main Results:

  • No evidence of endocrine effects in humans from consuming modern soy-based infant formulas.
  • Normal growth patterns observed in infants fed soy formulas.
  • No reported changes in the timing of puberty or fertility rates in humans who consumed soy formulas as infants.

Conclusions:

  • Soy-based infant formulas are a safe and nutritionally adequate alternative for infant feeding.
  • Current scientific literature does not support concerns about endocrine disruption in human infants consuming soy formula.
  • Soy formulas remain a viable option for infant nutrition.