> I am curious if anyone really knows how much salt our ancestors ate, and
> where they got it from. Many traditional nutritionists think no salt is
> necessary at all, but I thought it was a necessary component of our
> biochemical makeup.

I don't know how much we need but our body fluids are saline. Salt is found
in some vegetables like celery nowadays. There are also salt deposits here
and there in lands away from the ocean.