What is the normal range for potassium (K) levels in the blood?

The normal range for potassium (K) levels in the blood is vital for various physiological functions, as potassium plays a crucial role in maintaining proper muscle function, nerve transmission, and fluid balance. A typical healthy range for serum potassium is between 3.5 to 5.0 milliequivalents per liter (mEq/L).

This range is important because levels below 3.5 can indicate hypokalemia, which may lead to muscle weakness, abnormal heart rhythms, and other health issues. Conversely, levels above 5.0 can suggest hyperkalemia, which can also pose serious risks, especially to the cardiovascular system. The choice indicating potassium levels as 3.5 to 5 is therefore aligned with established medical standards and reflects the physiological needs for this essential electrolyte.