Assuming that you're not joking. . .
The food is so artificial that even bacteria doesn't even bother with it.
Many years ago on a late night radio show, there was some scientist talking about certain 'foods' that are so full of shit that they would remain untouched by, bacteria, insects and even rodents.
He challenged the listeners to conduct their own experiments. I left an open tub of flora margarine right down the back of an old dirty and damp store that I used to have, I kept checking it for a few months before I forgot all about it. Five years later, when clearing the place out as it had been sold, there it was - A nice golden yellow tub of perfect looking flora was still there, this place was full of flys and all kinds of other beasties and not one of them fancied even a wee bit of flora.
I haven't touched margarine since that day, which is pretty dumb on my part because I still eat McDonald's, as a matter of fact I tanned a box of 20 nuggets not so long ago