From the lectures I’ve been watching (people like Dr. Phinney, the Drs. Eades, James Dinicolantonio, et al.), it appears that the “evidence” linking salt intake to high blood pressure is about as solid as the evidence linking saturated fat to heart disease.
It’s only anecdotal evidence, of course, but after a year of eating keto and increasing my salt intake, my blood pressure is finally down to a healthy level. Of course, I couldn’t tell you if my increased salt intake is doing anything more than compensating for the higher excretion rate we experience on a ketogenic diet, but the new research does seem to suggest that there is plenty of room for most people to increase salt without worrying about it.
I am reminded of the instructions on an electrolyte drink one company I worked for gave us on particularly hot days (the plant was not air-condistioned, so we had to be aware of the risk of heat stroke): “Drink until the solution stops tasting good.” I suspect that given how critical the level of salt is in our bloodstream, the body probably is good about stimulating cravings when we need salt, and making it taste unappetizing when we’ve had enough.