“Ingredient Kosher” for Vegans

If I’m looking at a vegan product for year-round, what are the potentially-problematic ingredients to look out for? I presume vinegar, but anything else? I want to be able to decide for myself and know what to look for rather than post here every time I see...

“Meat” Fries

Must one wait 6 hours after eating fries from a meat restaurant or does this ש״ך (or another reason) exonerate one from waiting in such a case?