The US regulates Coumarin (which is the actually regulated substance, but commonly found in cinnamon), although differently. (Tonka beans, which contain it in very high quantities, and pure Coumarin aren't allowed to be used in food stuffs, but unlike in the EU there's no limit on the actual content of the end product)

The US are doing many things well, but the quality of their food in general is not really an example to follow.