What is the daily recommended amount of salt?
In the US, the current maximum recommended is 2300 mg daily unless you have health problems, for example high blood pressure,that would be exacerbated by excess salt. Other countries may suggest different maximums.
Minimum salt intake is about 500-700 mg daily. Otherwise, the resulting electrolyte imbalance could lead to cardiac and renal problems.
Depending on your kidney function more salt than the recommended daily amount can cause high blood pressure. Usually young people's kidney function can excrete the extra salt in the urine. However kidney function usually declines with age and seniors may not be able to dump the extra salt. For the word salt, read sodium.