Understanding Healthy Potassium Levels: What's Normal & What's Not

The acceptable blood potassium level has a small range, between 3.7 to 5.2 mEq/L. levels outside of this range may be the result of an underlying condition or of a medication that you are taking. Tests for potassium are normally done during the electrolyte test. (Ref. 2.)

Significance

• As an electrolyte, potassium plays a significant role in the body's electrical and cellular functions. With too much or too little potassium, the body can become imbalanced. (Ref. 1.)

Normal Level

• The normal level of blood potassium is between 3.7 to 5.2 mEq/L. (Ref. 2.)

Hyperkalemia

• If you have blood levels of potassium above 5.2 mEq/L, you have a condition known as hyperkalemia. This may be caused by a blood transfusion, kidney failure, or respiratory acidosis. (Ref. 2.)

Hypokalemia

• If you have blood levels of potassium below 3.7 mEq/L, you have a condition known as hypokalemia. Chronic diarrhea, vomiting, and Cushing sydndrome can cause hypokalemia. (Ref. 2.)

Considerations

• Because abnormal potassium levels are often the symptom of an underlying condition, your doctor may request additional tests to determine the cause. (Ref. 2.)