Hexane processing is really just the tip of the iceberg when it comes to problems associated with eating soy--and many of the health problems are unknown to the general public.
In 1999, the FDA approved the health claim that soy is "heart healthy" and reduces the risk of cardiovascular disease. But this wasn't without controversy. Two researchers for the FDA, Daniel Doerge and Daniel Sheehan stated that they were opposed to the labeling of foods containing soy as heart healthy since there was "abundant evidence that some of the isoflavones found in soy...demonstrate toxicity in estrogen sensitive tissues and in the thyroid."
Not Soy Fast: Why Soy Might Be Hazardous To Your Health