My soup tastes tart... Is it safe to eat? My soup tastes almost like someone poured some lemon juice into it. It smells fine, and other than being a little lemony, tastes OK. When I put it in the fridge a week ago, it didn't have that tart flavor.

What would cause this to happen? Is it safe to eat?

The soup was made from:


Chicken broth
Ground turkey
Ham
Broccoli 
Green beans
Onion
I would not eat any soup containing meat more than a day or two after it was cooked, and certainly not if it smelled suspicious. The logic with this kind of thing is simple. If you have any doubts, chuck it out. Not getting food poisoning is worth losing a little soup over.