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Salt substitution and stroke: a large village-randomized trial

The intervention changed sodium and potassium together, so it was not a potassium-pill trial.

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Supplement Science Insights Editorial Team

Published September 23, 2026

The study and its comparison

SSaSS enrolled 20,995 people in 600 rural Chinese villages. Participants had a previous stroke or were older adults with high blood pressure. Villages used regular salt or a mixture containing twenty-five percent potassium chloride. [1]

Over an average 4.74 years, stroke rates were about twenty-nine versus thirty-four per thousand person-years, favoring substitution. Major cardiovascular events and deaths were also less frequent. Serious events attributed to high potassium were not significantly different. [1]

What the finding establishes

The combined dietary change cannot isolate potassium from reduced sodium. A selected high-risk population and an open-label village design limit universal extrapolation. A nonsignificant safety comparison does not prove suitability for every kidney condition or medication regimen. Australia’s NHMRC funded the trial; complete conflicts were not established from the abstract. [1]

A hypothetical distinction

Imagine a replacement both removes one ingredient and adds another. Its effect belongs to the replacement strategy.

Interpretation checklist — Salt substitution and stroke
DetailInterpretation
Measured outcomeKeep the endpoint specific
Study preparationNot every retail product
Remaining uncertaintyNot resolved by a mechanism
Salt substitution and stroke: a large village-randomized trial — original article outline diagram
Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

Sources for this article

  1. Effect of Salt Substitution on Cardiovascular Events and Death.
    Source consulted: 2026-09-19. This is a reference resource, not a claim that we conducted the studies or tested a product.