Sodium is what has a RDV and a listing in products' nutrition facts, so it makes the most sense to discuss it in that fashion.
You can also get some of it from things like baking soda - salt isn't the sole dietary source.
What do you mean by that? If you’re talking about sodium chloride, then that’s sodium chloride, not salt. Can’t you just say reducing sodium chloride?
What do you mean by that? If you're talking about salt, then that's sodium chloride, not sodium. Can't you just say reducing salt?