A major new study shows that maintaining potassium at the high end of the normal range may help people with serious heart conditions live longer. Researchers followed more than 1,200 patients with implanted defibrillators for over three years. Those who kept potassium between 4.5 and 5.0 mmol/L had fewer heart rhythm problems, hospitalizations, and deaths compared to those with lower levels.
Potassium plays a direct role in the heart’s electrical system. Too little or too much can trigger dangerous arrhythmias, but hitting the “sweet spot” seems to reduce risk. In the study, patients kept their levels steady through supplements, diet changes, and close monitoring, while avoiding medications that lower potassium.
Experts caution that people should not try this on their own. Potassium levels can shift quickly into dangerous ranges, and the study required blood tests every two weeks. Doctors say the findings are promising, but anyone considering supplements or diet changes should work closely with their cardiologist to stay safe.
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