We know that a diet high in sodium can contribute to high blood pressure (hypertension) risk, but does this correlation actually raise heart disease and death risk? Research has produced mixed results, but a new study from Brigham and Women's Hospital in Boston clears up some of the controversy.
Inaccuracies in measuring sodium intake may help explain conflicting study results, say the researchers, and salt is often hidden in foods we eat – even foods that don’t taste salty – so sodium levels can be difficult to measure. For their study, they assessed sodium intake in several different ways, including the gold-standard method, which measures sodium excretion in multiple, non-consecutive urine samples.
The study involved about 3,000 people with pre-hypertension who were enrolled in the Trials of Hypertension Prevention. Results showed a direct, linear association between increased sodium intake and a higher risk of death.
Sourced from: International Journal of Epidemiology