Eliminating a teaspoon of salt a day from your diet works as well against hypertension as medication, and also in people who are already on medication for high blood pressure.
This is according to a new American study published in JAMA, which analyzed a group of approximately 250 people between the ages of 50 and 75.
The scientists chose a composite group precisely to verify the effect of a simple reduction of sodium in the diet.
Among the volunteers there were hypertensive people who did not take medication, others under pharmacological therapy and others who did not yet have problems with blood pressure, while for some the blood pressure remained abnormal even with medication.
The volunteers followed a high-sodium diet and a low-sodium diet each week, aiming to consume no more than 500 mg of salt per day.
Just one teaspoon of salt contains 2,300 mg.
"What we observed is a reduction in blood pressure in all hypertensives who managed to eliminate one teaspoon of salt per day regardless of whether they took medication or not," said the study's lead author, Norrina Allen of Northwestern University.
This is the first investigation to demonstrate that even already treated patients can have a further reduction in blood pressure values by acting on the amount of salt taken.
"During the low-sodium diet days, blood pressure decreased by an average of 6 mm Hg, a figure comparable to that obtained with medication," Allen specified.