Many (most) soy products are teated with HEXANE, a petroleum derivative, to separate oils from the soy solids. Hexane has been strongly implicated in relation to brain tumors.
The CORNUCOPIA INSTITUTE has a list of both non-hexane and hexane treated soy products.
Most interesting to backackers is the list of energy bars in the two groups.
For ex. Lara Bars are NON-hexane drived while Luna Bars are hexane derived, as are Clif Bars.
Will someone with more computer savvy than me please make a link to that site's page?
In general "ORGANIC" foods MUST be non-hexane derived while "NATURAL" foods usually contain hexane derived soy products.
Amazing what the FDA permits in food processing and that they have NOT updated their dangerous chemicals list since the '70s!

