I saw an interview with an Italian food manufacture. He stated that he was required to add 7 to 10 chemicals or ingredients that they did not add to ship to any other country. Only US. He said that the extra ingredients did not support the taste or texture of the food nor preserve it in any way. If he did not add it then he could not import his product into the US.

On another note. The FDA only regulates chemicals and radiation.
You find that many natural supplement are not FDA regulated. Many will not take supplements that are not FDA regulated. I will not take supplement that ARE FDA regulated. That tells me there are chemicals and/or radiation in the supplement/food.