I don't really eat any prepackaged foods besides macadamia/coconut milk. Mainly broccoli, spinach, celery, eggs, chicken, turkey, tuna and a ton of coconut/olive oil. A tablespoon of salt is 7080 mg of sodium. There haven't been any studies looking at ideal sodium intake for people on keto as far as I know, though it is generally accepted that there is a higher need since the liver gets efficient at excreting sodium.

I wouldn't necessarily recommend others take as much sodium as I do, only that personally I seem to feel better around that level. I have heard from some people that take as much as 11g a day on keto. I would definitely not exceed 5g much if I was on doing a standard diet though.