Sodium

Sodium helps maintain normal blood pressure, supports the work of your nerves and muscles, and regulates your body’s fluid balance. A normal blood sodium level is between 135 and 145 milliequivalents per liter (mEq/L). Hypernatremia (high blood sodium levels) is when your blood level is above 145. Hyponatremia (low blood sodium levels) is when your blood level is below 135. Diagnosing either hypernatremia or hyponatremia is done with lab work. Urine testing can also be done, but is generally not considered necessary.

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