How Much Soy is Safe?
According to the Soy Online Service, for infants, any soy is too much. For adults, just 30 mg of soy isoflavones per day is the amount found to have a negative impact on thyroid function. This amount of soy isoflavones is found in just 5-8 ounces of soy milk, or 1.5 ounces of miso. For more information on how much soy is too much, see the Soy Online Service guidance page. The USDA has launched a website that is promoting the health benefits of use of soy and soy foods. The USDA site lists the isoflavone content of a total of 128 foods, including foods such as vegetarian hot dogs soybeans, chickpeas and tofu. This can help you in deciding how much soy to include in your diet.
