11 doctors weighed in:

How much soy is too much? What problem can it cause? I usually have 1 glass of soy milk, 1 bag (1 pound) of edamame, & 1 box of tofu. Is it too much?

11 doctors weighed in
Dr. Francine Yep
Family Medicine
4 doctors agree

In brief: Ask Grandmom

What does your grandmom eat? You will most likely do well with the foods that your ancestors eat [asians may not handle dairy and wheat so well.
Anglos may not handle soy so well]. Most problems: powders & pills, not food. Your goal: keep your isoflavones less than 100 millgrams a day. [see comment for more info].

In brief: Ask Grandmom

What does your grandmom eat? You will most likely do well with the foods that your ancestors eat [asians may not handle dairy and wheat so well.
Anglos may not handle soy so well]. Most problems: powders & pills, not food. Your goal: keep your isoflavones less than 100 millgrams a day. [see comment for more info].
Dr. Francine Yep
Dr. Francine Yep
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2 comments
Dr. Francine Yep
ISOFLAVONE content: Tofu 4 oz 10 grams. Soy milk 8 oz 6-8 grams. Edamame 1/2 cup 47 mg
Dr. Francine Yep
*CORRECTION* should be MILLIGRAMS, not grams as stated above. ISOFLAVONE content: Tofu 4 oz 10 mg Soy milk 8 oz 6-8 mg. Edamame 1/2 cup 47 mg
Dr. Michio Abe
Internal Medicine
4 doctors agree

In brief: Soy may not be good

For all people. Eating large amounts of soy’s estrogen-mimicking compounds, isoflavones,  might reduce fertility in women, trigger early puberty and disrupt development of fetuses and children.
I can't give you any specific amount that would be too much, but I do recommend limiting the amount of soy consumption in children and women trying to get pregnant.

In brief: Soy may not be good

For all people. Eating large amounts of soy’s estrogen-mimicking compounds, isoflavones,  might reduce fertility in women, trigger early puberty and disrupt development of fetuses and children.
I can't give you any specific amount that would be too much, but I do recommend limiting the amount of soy consumption in children and women trying to get pregnant.
Dr. Michio Abe
Dr. Michio Abe
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Dr. Robert Kwok
Pediatrics
2 doctors agree

In brief: Balance is the key

Balance is the key in life.
A balanced diet means eating a serving of many varieties of foods. A person drinking 8 oz of soy milk each day sounds fine, but eating 1 pound of soybeans a day means 30 pounds a month . . . That sounds a bit much. Also, eating 1 box (4 big squares) of tofu a day means 7 boxes of tofu a week . . . Sounds like enough to make meals a bit boring. Again, variety is the key.

In brief: Balance is the key

Balance is the key in life.
A balanced diet means eating a serving of many varieties of foods. A person drinking 8 oz of soy milk each day sounds fine, but eating 1 pound of soybeans a day means 30 pounds a month . . . That sounds a bit much. Also, eating 1 box (4 big squares) of tofu a day means 7 boxes of tofu a week . . . Sounds like enough to make meals a bit boring. Again, variety is the key.
Dr. Robert Kwok
Dr. Robert Kwok
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