I would only worry about he sugar and fake sugars found in the supplements; maltodextrin, sorbitol, etc. I looked at some of the flu/cold stuff at a major store here in the US and sorbitol was the top ingredient. Some of these places just give you crap/worthless supplements.
I wouldn’t worry about the stuff they are free from; I even take some standard process supplements that contain low amounts of lactose and it hasn’t set back my progress.
You’ve become too paranoid about the vitamins and need to suck it up and take them.