MediQWhy cutting salt alone may not be enough to control your blood pressure
A new scientific report suggests that eating more potassium-rich foods alongside reducing salt could better manage high blood pressure. This combined approach matters because many people consume too much sodium and too little potassium.
In short
- Eating more potassium while reducing sodium may control blood pressure better than cutting salt alone.
- Fruits, vegetables, beans, and dairy products are natural sources of potassium.
- People with kidney disease or on certain medications need medical guidance before increasing potassium.
For decades, the standard advice for high blood pressure has been simple: eat less salt. But a new scientific report suggests this familiar message is missing an equally important step.
Researchers say that combining increased potassium intake with reduced sodium consumption may offer greater benefits for blood pressure control than cutting sodium alone. High blood pressure, also known as hypertension, affects more than 1.28 billion adults worldwide and is a major risk factor for heart attacks and strokes.
How do sodium and potassium work together?
Sodium and potassium are essential minerals that help regulate fluid balance, nerve signaling, and muscle function. Eating too much sodium causes the body to retain extra fluid, which increases pressure inside blood vessels.
Potassium helps counter some of these effects by supporting the kidneys in removing excess sodium through urine. It also contributes to the normal functioning of blood vessel walls.
"Growing evidence shows that increasing dietary potassium as well as reducing sodium intake work together to better manage hypertension," said Dr. Naomi Fukagawa, professor of medicine emerita at the University of Vermont and first author of the report.
The report was published in the American Journal of Clinical Nutrition.
What should you actually eat?
Many people consume too much sodium while getting nowhere near enough potassium. The authors note that potassium intake remains "far below optimal levels in both developed and developing nations."
Potassium is naturally present in many familiar foods. To increase your intake, you can eat more:
- fruits such as bananas
- vegetables including potatoes and leafy greens
- legumes like beans
- dairy products such as yogurt
Another option discussed in the report is replacing some ordinary table salt with potassium salts. These substitutes reduce sodium while adding potassium, though food manufacturers face challenges keeping the flavor pleasant.
Is extra potassium safe for everyone?
Reducing sodium remains essential, and the researchers are not suggesting anyone abandon existing advice. However, increasing potassium is not appropriate for everyone.
People with kidney disease or those taking certain medications may have difficulty regulating potassium levels. For these individuals, potassium supplements and potassium-based salt substitutes should only be used with medical guidance.
The bottom line is that better blood pressure control may depend not only on what you remove from your diet, but also on what you add.
What you can do now
- Add potassium-rich foods like bananas, potatoes, beans, leafy greens, and yogurt to your daily meals.
- Continue limiting your salt intake, as reducing sodium remains essential for blood pressure control.
- Talk to your doctor before using potassium salt substitutes if you have kidney disease or take regular medications.
Questions you may have
Should I stop trying to eat less salt?
No. The researchers emphasize that reducing sodium remains essential. Their proposal expands current advice by adding potassium rather than replacing it.
Can I use potassium salt substitutes freely?
Not necessarily. People with kidney disease or those taking certain medications may have difficulty regulating potassium levels and should seek medical guidance before using them.
Which everyday foods contain potassium?
Bananas, potatoes, beans, leafy greens, and yogurt are examples of familiar foods that can help increase potassium intake.
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