I really wish this was a joke, but it's not.
Short version: do not give your kids any food containing high fructose corn syrup. And you should probably avoid it too.
How did the heavy metal get in there? In making HFCS — that “natural” sweetener, as the Corn Refiners Associaton likes to call it — caustic soda is one ingredient used to separate corn starch from the corn kernel. Apparently most caustic soda for years has been produced in industrial chlorine (chlor-alkali) plants, where it can be contaminated with mercury that it passes on to the HFCS, and then to consumers.
Also "...the average high-end dose from HFCS is 28 micrograms per day, and the dose from a dental amalgam is 1 microgram per day. Canada and other areas do not recommend dental amalgam (silver fillings) for children."
(via the Accidental Hedonist)