"Other scientists were not so sure just what was going on here. If tofu consumption increased Alzheimer's incidence, then there would be more Alzheimer's in Japan than in Hawaii, because more tofu is eaten in Japan. But in fact the reverse is true.
What, then, could have been the cause of the findings? People with Alzheimer's disease characteristically have higher levels of aluminum in their brains. Many studies have shown a link between increased levels of aluminum consumption and risk of Alzheimer's disease. Higher levels of aluminum in drinking water, for example, typically produce higher rates of the disease. When a physician practicing in Hawaii, Bill Harris, subsequently had soy products made in Hawaii and those from the mainland tested for their aluminum levels, the levels of aluminum in the Hawaii products were found to be significantly higher. Could it be that it is aluminum - used in the refining of some soy products in Hawaii - that is the actual culprit? No other study to my knowledge has ever found a link between soy consumption and Alzheimer's, but dozens of studies have supported the link between aluminum and the disease."
Just don't boil your tea in an aluminum pot.
(That's why I hot-linked,
and that's why I ended with
the "other doctors...")
My experience
is that anecdotally
some doctors and some
nutritionists have
become skeptical on soy.
Without firm studies
nobody will say
anything on the record.
But informally,
I've been hearing and
seeing comments suggesting
giving soy a pass.