Here's an excerpt from a Chicago Tribune story:
<< So what's wrong with eating rancid oils?
"There are at least two," says lipid specialist and University of Massachusetts professor Eric Decker. "One is that they lose their vitamins, but they also can develop potentially toxic compounds" that have been linked to advanced aging, neurological disorders, heart disease and cancer.
"They're carcinogenic, pro-inflammatory and very toxic," says integrative medicine specialist Andrew Weil. "They are also widespread in the food chain." >>
Link to entire article: A kitchen full of dangerous products - Chicago Tribune