What are the normal serum sodium levels in adults?

Normal serum sodium levels in adults typically range from 135 to 145 mEq/L. Sodium is a crucial electrolyte in the body, playing a vital role in maintaining fluid balance, transmitting nerve impulses, and muscle function. These values represent the healthy concentration of sodium in the blood, which is critical for physiological homeostasis. When sodium levels deviate from this range, it can indicate underlying health issues, such as hyponatremia (low sodium levels) or hypernatremia (high sodium levels), both of which may lead to a range of symptoms and complications if not addressed. Understanding the normal serum sodium levels is essential for evaluating a patient's electrolyte balance and overall health.