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Look Ma, Too Much Soy: Hormone in infant food reduces immunity in mice

The health benefits of soybeans are legion, but too much of the food may have a downside.

A new study finds that large doses of the estrogenlike hormones that occur naturally in soybeans weaken the immune systems of mice. The finding has yet to be proven relevant to people, but soy's widespread use makes the finding worthy of further investigation, some researchers say.

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