Their poisons are always spread across all available vectors. This way you can claim that X product has less than the legal limit and provide a harmful amount of exposure. Japan has it pretty bad because they package every single thing multiple times and have so many processed foods. I once had a cookie out of a box there I had to remove from 7 layers of carton and wrapping to get to the cookie.
Yep. Look at carbonated beverages for instance. If you go to a gas station where it is one single provider, it's basically all citric acid or phosphoric acid; meant to bring out the heavy metals that magically find their way into foods like baked goods, snacks, cheeses, tea, seafood, leafy greens, potatoes, carrots, onions, rice, cookware, dishware, foil, drinking water, antacids, antiperspirants, and the air.