I wonder who's opinion you are trusting that it is safe. History should dictate to us all that most cannot be trusted. If you choose to ingest the same chemical that I pump into heating systems to keep them from freezing, then it is your right. If you choose to trust the government, or the media, or corporate interests. it is your choice and I respect that. I also know better.I can't resist a quick fact-check on one of the issues you raised (though not the only one that needs one), that of propylene glycol. It's not ACTUALLY antifreeze (though it has some antifreeze properties) and is quite safe: NeuroLogica Blog » OMG – The Chemicalz
However, trying a new thing each week is an excellent suggestion. It's best to vary one's diet as much as possible. There are a wide variety of foods that can give you the nutrients you need, so find what you like best (or at least can tolerate the most). Fresh food is ALWAYS better than processed or pre-packaged, so cooking skills come in handy.
And I beg to differ, but it IS antifreeze. Why do you think they put it in there? It is so the cream stays soft enough to scoop. Otherwise it would be solid until melting.