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Soy-based formulas and phyto-oestrogens: a safety profile.
V L Miniello1, G E Moro, M Tarantino
1Dipartimento di Biomedicina dell'Età Evolutiva, University of Bari, Italy. vito.miniello@libero.it
Acta Paediatrica (Oslo, Norway : 1992). Supplement
|November 6, 2003
Summary
Soy infant formula is generally safe, providing high levels of phytoestrogens like isoflavones. While no adverse effects are documented, further research on soy-based formulas and infant endocrine health is recommended.
Area of Science:
- Endocrinology
- Nutritional Science
- Toxicology
Background:
- Phytoestrogens, plant compounds with estrogenic activity, are found in soy.
- Soy intake is linked to potential health benefits, but data on infant exposure is limited.
- Concerns exist regarding the safety of isoflavones in infant formulas due to potential hormonal effects.
Purpose of the Study:
- To review the available data on the endocrine effects of soy phytochemicals in infants.
- To assess the safety of soy-based infant formulas.
Main Methods:
- Literature review of epidemiological studies and reports on soy-based infant formulas.
- Analysis of phytoestrogen content in soy formulas and potential exposure levels for infants.
Main Results:
- Infants fed soy formula receive high levels of isoflavones (genistein, daidzein).
- No adverse short- or long-term effects of soy protein or soy formula have been observed in humans.
- Reproductive outcomes in infants fed soy formula are comparable to those fed cow milk formula.
Conclusions:
- Soy-based infant formula appears to be a safe feeding option for most infants.
- Further extensive studies in animal models and human populations are needed to confirm the long-term safety of soy-based infant formulas.