Soy-based formulae and infant growth and development: a review

Area of Science:

• Pediatrics
• Nutrition Science
• Endocrinology

Background:

• Soy-based infant formula is a common alternative for infants with lactose intolerance or cow's milk allergy.
• Formulations have evolved to enhance digestibility, mineral stability, and protein quality.
• Concerns exist regarding the isoflavone content of soy formula and potential health impacts.

Purpose of the Study:

• To systematically review clinical studies comparing soy-based formula with other infant diets.
• To evaluate infant health and development measures.
• To identify areas needing further research regarding soy formula consumption.

Main Methods:

• Systematic literature review of clinical studies.
• Comparison of infant health and development outcomes between soy-based and other infant diets.
• Analysis of data on growth, nutritional status, sexual maturation, and reproductive health.

Main Results:

• Modern soy-based formulas support normal growth and nutritional status in healthy infants during the first year of life.
• Limited data exist on sexual/reproductive development, immune function, cognitive development, and thyroid function.
• No significant differences observed in timing of maturation, sexual development, or fertility in adolescents/adults.

Conclusions:

• Soy-based infant formula is adequate for healthy term infants in the first year.
• Long-term effects of early soy/isoflavone exposure warrant further investigation into adulthood.
• More research is needed to fully understand the impact of soy-based formulas on various health outcomes.