I remember reading somewhere that margarine was only one molecule away from being a form of plastic. I don't fancy myself eating plastic in any way shape or form.
PJ
I've posted this before but it's still true:
I had an old beater camp trailer that I parked and used for storage for 10 years. I know the time because of the tags. I then cleaned it out to give it to a friend. When I got to the ice box, I found an unopened box of margarine from the last time I used it. Except for dust on the box, it was like it came new from the store. It hadn't molded or deteriorated a bit. Anything that can sit in the heat and cold for 10 years like that isn't food. I haven't eaten margarine since.