I can't put my hand on it quickly, but that is what one study showed. It was a very large study so covered a lot of people but was if I recall correctly associational so can not prove causation.

It basically was a chart that showed there was a sweet spot in the middle of the chart where all cause mortality was lowest at a certain salt intake level. Then to the right as the salt intake increased all cause mortality raised but only modestly up to the maximum amount of salt intake. Then to the left of the sweet spot for salt intake where less salt was consumed the all cause mortality also raised but at a much greater rate of increase than too much salt. More people died on too little salt than on too much. And the maximum amount of salt intake life lost was lower than the minimum by a significant amount.

Moral to the story is salt is essential for life. Too little is worse than too much. At least that is what that rather large and long term study showed. I can see the chart in my head but I don't remember what video provided it.

The medical community has kind of vilified salt. But in reality it is a mineral essential for life and without it we would definitely die. The kidneys are very adept at regulating our blood salt levels. Consume too little and they hold on to salt. Too much and you pee and poop it out. The body eliminates excess. At least that is what the big boys tell me. I probably don't really know.