diana et al:

     there is a eye opening letter in the july 95 pediatrcs titled:
persistant hypothyroidism in an infant receiving a soy formula: case report
and review of the literature"

    the first sentence: soy endced goiter was a well -known phenomenon befreo
1966,


     "soy diets are known to indice hih uptake goiters from an increased
iodine requirement after T4 depletion through fecal wastage. "

           sorry this doesn't answer your question diane but it is more food
for thought.

                            patricia