For decades, one of the most common recommendations for reducing high blood pressure has been simple: eat less salt. But a new scientific report suggests that this advice may be missing an equally important part of the equation.
Researchers say increasing potassium intake, rather than focusing solely on sodium reduction, could lead to better blood pressure control. By addressing both nutrients together, this approach could strengthen efforts to prevent hypertension and reduce the risk of serious cardiovascular problems.
The potential impact is enormous. High blood pressure, also known as hypertension, affects more than 1.28 billion adults worldwide and is a major risk factor for cardiovascular disease, including heart attack and stroke. Although public health recommendations traditionally emphasize sodium reduction, researchers now argue that sufficient potassium intake deserves just as much attention.
Why potassium is important for blood pressure
Sodium and potassium are essential minerals that help regulate fluid balance, nerve signaling and muscle function. Both also influence blood pressure, but they affect the body in different ways.
Eating too much sodium can cause the body to retain more fluid, increasing pressure inside blood vessels. Potassium helps counteract some of the effects of sodium by helping the kidneys eliminate excess sodium through urine. It also contributes to the normal functioning of blood vessel walls, which play an important role in maintaining healthy blood pressure.
In a new report, doctors and health experts say dietary recommendations should address these two minerals together. Rather than considering sodium reduction as the main solution, they suggest combining it with greater potassium consumption to achieve better results.
“It is time to view dietary interventions holistically because dietary components interact and physiology is integrated across systems,” said Naomi Fukagawa, MD Ph.D., professor emeritus of medicine at the Robert Larner, MD College of Medicine at the University of Vermont and first author of the report. “There is growing evidence that increasing dietary potassium and reducing sodium intake helps better manage hypertension.”
A major overhaul of blood pressure guidelines
The report, published in the peer-reviewed journal American Journal of Clinical Nutritionwas supported by the IAFNS Committee on Implications of Sodium in Foods and Health.
Researchers examined the scientific evidence behind current sodium and potassium recommendations, as well as practical ways to reduce sodium intake and increase potassium intake. They also explored barriers to implementing these changes and identified areas where additional research and updated public health policies could help improve outcomes.
One of the biggest concerns is that many people eat too much sodium while not getting enough potassium. Both diets can contribute to high blood pressure, making them important targets for prevention and treatment.
Despite widespread efforts to encourage people to limit salt, average sodium intake continues to exceed recommended levels. Meanwhile, potassium intake remains “well below optimal levels in both developed and developing countries,” according to the authors.
This imbalance suggests that focusing primarily on what people should eat less of could be overlooking an important opportunity to improve cardiovascular health by encouraging them to consume more of a beneficial nutrient.
How to Get More Potassium in Your Diet
Potassium occurs naturally in many familiar foods, including fruits, vegetables, legumes and dairy products. Bananas, potatoes, beans, leafy greens, and yogurt are examples of foods that can help increase potassium intake.
Another possibility is to replace some of the sodium chloride, the main ingredient in regular table salt, with potassium salts. These substitutes can help reduce sodium while simultaneously increasing potassium, potentially meeting both dietary goals at once.
However, creating these products presents challenges for food manufacturers. Adding too much potassium salt can produce an unpleasant metallic taste, limiting the amount that can be used without affecting the flavor. Manufacturers therefore need to find a balance that improves nutritional content while keeping foods appealing to consumers.
Increasing potassium is also not appropriate for everyone. People with kidney disease or those taking certain medications may have difficulty regulating their potassium levels. Therefore, potassium supplements and potassium-based salt substitutes should be used with the advice of a physician when these concerns apply.
A new strategy to fight high blood pressure
Researchers emphasize that sodium reduction remains essential. Their proposal is not to abandon existing advice, but to expand it by recognizing that potassium intake is another major factor in regulating blood pressure.
The authors conclude that “reducing dietary sodium is a fundamental strategy for the prevention and management of hypertension. However, emerging evidence supports an expansion of the current approach that focuses solely on sodium reduction and places equal importance on increasing potassium intake.”
For more than a billion people with hypertension, this shift in thinking could have significant implications. Instead of focusing almost exclusively on salt reduction, future dietary recommendations may increasingly emphasize the combined benefits of consuming less sodium and more potassium.
The underlying message is simple: Better blood pressure control may depend not only on what people get from their diet, but also on what they add.
Gn Health
