I feel if I eat too much salt. First I find my food too salty (I eat cured meat every day and it’s very salty), then I feel a strange burn all the time and then I develop a salt aversion and drop the salted meat (I drop added salt earlier) and eat the least salty food… Eggs are very nice then.
But it’s just me (and happened only once when I was kind of forced to eat too much salty meat), we are all different. Our sodium need and tolerance too. I love keeping my salt around a tablespoon a day, it’s probably double when I eat much cured pork but it’s just a guess, it doesn’t come with a label… The keto recommended amount would be awful to me, I do my best to avoid going near! (I ate it once though, I mean, I sit down and ate it. I had to try. A single occasion didn’t do bad but doing this regularly is different. My probably ~10g salt a day caused problems in a week. Once but whenever I eat more salt, I feel my body isn’t quite fond of it.)
It seems I like my food less and less salty (though my smoked pork interferes) but if I follow my taste, it’s always fine. I never supplemented sodium but I don’t do long fasts.
I imagine using our taste as a guide often works… But water intake, activity, weather and zillion other things surely matter too. But I don’t hear from people that they need actively control their intake to feel right… So I guess it should work properly under normal circumnstances.