The American Heart Association (AHA) recommends eating less than 1,500 mg of sodium a day.

Sodium image High sodium intake can increase the risk of having high blood pressure, which is a major risk factor for heart attack or stroke. Some people may be more sensitive to salt than others, but most Americans are still getting much more sodium in their diets then they need. There is evidence that if adults eat less sodium, their blood pressure decreases.

Since it is difficult to know who among us will benefit most from less salt, most organizations recommend that we all limit our salt intake. According to the United States Department of Agriculture, adults should limit their salt intake to no more than 2,300 mg per day. And those with high blood pressure, diabetes, or chronic kidney disease, as well as African Americans and adults 51 years or older should limit their sodium intake to less than 1,500 mg a day.

A major study in this area is DASH, the Dietary Approaches to Stop Hypertension. This study found that a diet rich in fruits, vegetables, and low-fat dairy products, and low in saturated fat, cholesterol, and saturated fat helped lower blood pressure. This is now known as the DASH diet. The second phase of the study found further reductions in blood pressure when the DASH diet was combined with a sodium intake of no more than 2,300 mg per day.