Is estimated intake of sodium and potassium associated with blood pressure?
The relationship between sodium/potassium intake and blood pressure is nonlinear, with the most pronounced effects observed in older individuals, those with baseline hypertension, and those consuming high-sodium diets.
In this study, the association of estimated intake of sodium and potassium, as determined from measurements of excretion of these cations, with blood pressure was nonlinear and was most pronounced in persons consuming high-sodium diets, persons with hypertension, and older persons. (Funded by the Heart and Stroke Foundation of Ontario and others.).
Mente et al. (Wed,) studied this question.