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

The normal range of potassium levels in the blood is critical for evaluating various physiological functions, including nerve conduction, muscle contraction, and fluid balance. The correct range of 3.5-5.0 mEq/L indicates the levels at which potassium effectively supports physiological functions without leading to complications. When potassium levels remain within this range, it helps ensure proper cardiac function, muscle function, and overall cellular operations.

Potassium is an essential electrolyte, and deviations outside this normal range can lead to significant health issues. For instance, levels below 3.5 mEq/L can result in hypokalemia, which may cause muscle weakness, cardiac arrhythmias, and altered neuromuscular function. Conversely, hyperkalemia, defined as potassium levels above 5.0 mEq/L, can lead to serious cardiovascular issues including potential cardiac arrest, making it essential to maintain potassium levels within the established norms for health and wellness.