For me, after awhile, it became a mind set. Since I have no idea what went into this food, or how it was prepared, or the sanitation of the preparer, I'm much more wary of the pot luck/party foods.
This does not mean that all of those foods are bad, I've just gotten more picky/particular about the food presented.
I tend to lean towards dishes that have only 2 to 4 ingredients that I can identify. Casseroles, things like cole slaw, potato salad, macaroni salad, taco salad, anything, that I cannot disect or identify a few simple ingredients, I try so stay away from.
This does not mean that I do not now and then, eat some of these foods, because I do, but, I'm mindful to pick only one or two, in small portions, and otherwise stick to things I can actually identify!
3+ year maintainer.
The human body is capable of amazing things! But without the mind, it is nothing. Get your mind in gear and the body will follow!
Be selfish about caring for yourself, you deserve it!