We are so addicted to simplistic slogans - any catchy one will get air time (if you pay for it.)

It's been a while since I inspected some of the data and assumptions extrapolated from it; maybe it's gotten better (or just been repeated often enough?) Given Herr Gauss, I saw no 'factor' for the very wide range of individual susceptibilities to various of the ingredients, and in a few debates which did address the technical: I recall 'defensiveness' at points I call crucial.

So I have the whole topic filed under, dubious.
(Er, then we could do DDT ;-)