What is the normal range for potassium levels in the blood?

The normal range for potassium levels in the blood is essential for maintaining several critical bodily functions, including nerve conduction and muscle contraction. The range of 3.5 to 5.0 mEq/L is recognized as the standard for healthy adults. Levels outside this range can indicate various health issues; for instance, low potassium levels (hypokalemia) can lead to muscle weakness and arrhythmias, while high levels (hyperkalemia) can be life-threatening due to the risk of cardiac arrest. This range is foundational in clinical practice and essential for healthcare providers when interpreting lab results and managing patient care.