Sodium

Sodium is an essential electrolyte for fluid balance, nerve function, and muscle activity, with levels indicating hydration and kidney function.

📋 About This Biomarker

Sodium is an essential electrolyte in the body, playing a crucial role in maintaining fluid balance, transmitting nerve impulses, and muscle function. It is mainly found in the extracellular fluid and is regulated by the kidneys, which control sodium levels by adjusting the amount excreted in the urine. Sodium levels in the blood can indicate hydration status, kidney function, and overall electrolyte balance. Abnormal sodium levels can lead to various health issues: high sodium levels (hypernatremia) can result from dehydration, excessive salt intake, or certain medical conditions, while low sodium levels (hyponatremia) can be caused by excessive fluid intake, kidney dysfunction, or conditions like heart failure and cirrhosis. Monitoring sodium levels helps diagnose and manage these conditions, ensuring proper bodily functions.

🎯 Why We Test This

Measuring sodium levels is crucial for diagnosing and managing conditions related to fluid and electrolyte balance, kidney function, and overall hydration status. It provides valuable insights into how well the body maintains homeostasis and helps identify issues like dehydration, overhydration, and electrolyte imbalances. Regular monitoring of sodium levels is particularly important for individuals with kidney disease, heart failure, liver disease, or those taking medications affecting fluid balance. Maintaining sodium levels within the normal range is vital for preventing complications and ensuring overall health.

⚠️ What Affects It

Factors influencing sodium levels include dietary sodium intake, hydration status, kidney function, hormonal regulation (such as aldosterone and antidiuretic hormone), medications (such as diuretics), and underlying medical conditions (like heart failure, liver disease, and adrenal gland disorders). Conditions like dehydration, excessive sweating, vomiting, and diarrhea can also impact sodium levels.

📈 How to Improve

For high sodium levels, increasing fluid intake, reducing dietary sodium, and addressing underlying conditions like kidney dysfunction are crucial. For levels close to being high, similar adjustments and monitoring fluid intake can help maintain balance. For low sodium levels, reducing excessive fluid intake, ensuring adequate dietary sodium, and treating underlying conditions like heart failure or kidney disease are important. For levels close to being low, similar dietary and fluid intake adjustments can help maintain optimal sodium levels. Regular monitoring and consultation with a healthcare provider ensure that sodium levels remain within the optimal range, reflecting good overall health and proper fluid and electrolyte balance.

📊 Understanding Your Results (mmol/L)

Low (< 135 mmol/L)
Low sodium levels (hyponatremia) indicate an excess of body water relative to sodium, often resulting from conditions like heart failure, liver disease, kidney dysfunction, or excessive water intake. Symptoms of hyponatremia include headache, nausea, fatigue, muscle weakness, and in severe cases, confusion, seizures, and coma. Treating the underlying cause, such as adjusting fluid intake and managing medical conditions, is essential for restoring normal sodium levels and preventing complications.
Optimal (135 - 145 mmol/L)
Normal sodium levels indicate a healthy balance of fluid and electrolytes, reflecting proper kidney function and overall good health. This balance ensures effective nerve and muscle function, as well as fluid homeostasis in the body. Sodium levels near the upper limit may suggest mild dehydration or a high-sodium diet. Monitoring these levels and ensuring adequate fluid intake while reducing dietary sodium can help maintain balanced sodium levels and overall health. Sodium levels near the lower end may indicate early signs of hyponatremia, often due to factors like excessive fluid intake, mild kidney dysfunction, or conditions affecting sodium regulation. Monitoring these levels and addressing any contributing factors can help prevent further decline.
High (> 145 mmol/L)
Elevated sodium levels (hypernatremia) indicate dehydration, excessive sodium intake, or conditions such as diabetes insipidus, hyperaldosteronism, or kidney disease. Symptoms of hypernatremia include thirst, confusion, muscle twitching, and seizures. Identifying and treating the underlying cause, such as rehydration and adjusting sodium intake, is crucial for managing high sodium levels and preventing complications.
Also known as: Sodium