I read ingredients and I often concerned — at least they are forced to list them now.
100+ years ago before the rules were put in place, it was crazy what happened. Lead was deliberately put into candy I believe as a pigment. Heck, in the past 50 years they used to think tuna had high lead levels when pulled out of the ocean — wrong: lead friggin solder used in tuna cans. Of course, mercury levels are high due to ocean levels of Hg from coal-burning power plants.
Nothing however compares to the spread of lead throughout the world via lead anti-knock compounds added to gasoline. It is a huge irony that we were suddenly being protected by the government in one area (food and drug) while the government did nothing for decades about air pollution even as the number of private cars and highway miles grew like crazy.