The "Science" of Salt...?

I have always been told to keep my salt intake to a minimum, but like much advice from those that espouse to know best about these type of things, this advice is largely built on "wild extrapolations" and some very questionable science. I find it fascinating how certain advice, ideas and explanations become "conventional wisdom" in our culture. I also find it fascinating how many of these conventional wisdoms are at best a lot more nuanced and at worst just plain wrong. There is a lot of information out there on salt so here's a quick intro to the subject (click on pic below):