Potassium is a mineral (electrolyte) in the body. Almost 98% of potassium is found inside the cells. Small changes in the level of potassium that is present outside the cells can have severe effects on the heart, nerves, and muscles.
Potassium is important to maintain several bodily functions:
The kidney is the main organ that controls the balance of potassium. It removes excess potassium into the urine.
When potassium levels are low (hypokalemia), you can become weak as cellular processes are impaired.
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