Our taste for salt is acquired. For decades, infants were fed baby food with a high salt content. Since it was tastier, it made feeding easier, and mothers were encouraged to buy it. This set a pattern for later life and is why many of us eat more salt than we need.
Table salt increases average levels of blood pressure.
Some people who consume diets heavy in salt develop high blood pressure. In some of those, the kidneys cannot wash out enough salt. As salt accumulates in the body, the heart must pump more blood with each beat, which also increases blood pressure. If you have high blood pressure, you should reduce the amount of salt in your diet - to 6 grams, or 2400 mg. Unfortunately, a moderate reduction in salt will not by itself usually lower blood pressure to normal levels except in some less severe cases.