In the book Salt by Mark Kurlansky there are some mentions of the daily intake of salt averaging forty to seventy grams a day, which appears to be too high to me. Is it accurate? How did they manage to not be extremely sick from such a high salt intake?
Not a history answer. Did the source say 40 to 70 gr? That could be grains, not grams, and is the equivalent of 2.5 to 4.5 g, which makes a lot more sense.