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Potassium is an electrolyte that plays a role in hydration and fluid regulation within the body, says registered dietitian Natalie Rizzo, nutrition editor for TODAY. “It also factors into blood ...

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Ro took a closer look at an at-home cure for erectile dysfunction and discovered it should be taken with a big grain of salt.

A healthy range of blood potassium levels is 3.5 to 5.0 millimoles per liter of blood. Levels above this may indicate hyperkalemia, which occurs most often in people with chronic kidney disease.