In visual perception a color is almost never seen as it really is - as it physically is. This fact makes color the most relative medium in art.
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.
Justice requires that everyone should have enough to eat. But it also requires that everyone should contribute to the production of food.