If you look at the purported dangers of salt or fat there is no consensus of support in scientific literature. So I would ask first: 'Is it possible to have an informed government that actually follows the science?' From what I've seen it's not likely.
Science almost from its beginnings has been truly international in character. National prejudices disappear completely in the scientist's search for truth.
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I do love science fiction but it's not really a genre unto itself it always seems to merge with another genre. With the few movies I've done I've ended up playing with genre in some way or another so any genre that's made to mix with others is like candy to me. It allows you to use big mythic situations to talk about ordinary things.