The study analysed previous studies to estimate the benefits of salt reduction on lowering blood pressure and its effect on decreasing heart disease, stroke and heart attacks.
The researchers found that everyone would benefit from less salt, but people at higher risk for heart problemspeople with hypertension and people over 65would benefit most.
Not every expert was persuaded. Michael Alderman, a professor of medicine and epidemiology at Albert Einstein College of Medicine, said the research was based on the assumption that there would be no other effects of reduced sodium, but thats not so. He said salt reduction could lead to insulin resistance and imbalances of hormones.