Soy is probably the worst thing you can have, unless it's natural and fermented (natto etc).
It's full of phytic acid (blocks absorption of minerals like zinc, magnesium, iron...) and phytoestrogens, it contains high numbers of 'antinutrients' that block a number of amino acids and aren't killed by cooking, the processing loads it up with MSG and carcinogens, it stops the thyroid working properly (loads of goitrogens), wreaks havoc on the pancreas, is a major contributor to female cancers, is highly allergenic, and around 80% is genetically modified.
Definitely not the health food the soy industry would have us all believe.
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