A study published in The American Journal of Physiology-Renal Physiology in March 2025 suggests that increasing dietary potassium intake may be more effective for blood pressure control than simply reducing sodium, according to research conducted by scientists from the University of Waterloo. The study used a simulation model that replicates blood pressure regulation mechanisms, including the interactions between the kidneys, heart, blood vessels, digestive tract, renal sympathetic nerves, and hormones. The model calculates urinary excretion, blood volume, and resulting pressure and is available in open access for further testing and validation by other researchers. The study's findings challenge long-standing clinical advice, which has emphasized salt reduction as a primary method for managing hypertension. According to the researchers, increasing the ratio of potassium to sodium in the diet could lower blood pressure more effectively than reducing sodium alone. Foods such as bananas and broccoli were cited as examples of potassium-rich options that could be incorporated into the diet. Hypertension affects more than 30% of adults worldwide and is a leading cause of coronary disease and stroke. The study also found differences in how men and women respond to changes in the potassium-to-sodium ratio. Men appear to benefit more from increasing potassium intake, while the effects on women after menopause remain unclear. The researchers proposed an evolutionary explanation, suggesting that human physiology may have adapted to a diet rich in potassium and low in sodium, which is contrary to modern Western diets that are typically high in sodium and low in potassium. It is important to note that the study's results are based on a simulation model and have not yet been tested in human trials. The researchers emphasized that no patient has been recruited, and no blood pressure measurements have been taken using a cuff. Therefore, the findings require confirmation through human studies before they can influence clinical guidelines. Current official recommendations regarding salt intake remain unchanged, with the World Health Organization suggesting a daily limit of approximately five grams of salt. Additionally, the study highlights the importance of obtaining potassium through dietary sources rather than supplements, as high-dose potassium supplements can pose risks, particularly for individuals with chronic kidney disease or those taking certain medications such as potassium-sparing diuretics and ACE inhibitors. Medical consultation is recommended before making significant changes to dietary potassium intake.