I agree Bex, it seems like there are contradictions all over the place about these materials. I sort of think that we as a group are in a trial-and-error period right now, as we really won't know the consequences of our choices for many years down the road, even if we don't acutely 'react' to whatever we put in today. Unless we are chemists with access to precise measuring tools, we really are not able to truly measure for ourselves what is happening with any of these materials--we are kind of forced to take someone else's word for it. It seems like the best we can really do is try to figure out who is telling the truth, and who is repeating someone else's mantra for the sake of profit... <img src="/ubbthreads/images/graemlins/frown.gif" alt="" />

Jason