“On average, as salt (sodium chloride) intake increases, so does BP. A reduced sodium intake can prevent hypertension in nonhypertensive individuals, can lower BP in the setting of antihypertensive medication, and can facilitate hypertension control.”
Source: Lichtenstein et al. Diet and lifestyle recommendations revision 2006: a scientific statement from the American Heart Association Nutrition Committee. Circulation. 2006 Jul 4; 114(1):82-96.