Sodium levels in your body are primarily checked through blood and urine tests. These tests provide a precise measurement of sodium concentration, helping diagnose various health issues.
Blood Sodium Test
A blood sodium test, also known as a serum sodium test, is the most common method. This simple test measures the amount of sodium in your blood. A small blood sample is drawn from a vein, usually in your arm. The results reveal the sodium concentration in milliequivalents per liter (mEq/L). A normal range is typically between 135 and 145 mEq/L, but this can vary slightly depending on the laboratory. Abnormal levels may indicate kidney problems or other disorders. Mount Sinai, MedlinePlus, Healthline, UCSF Health, WebMD, Testing.com
What the Results Mean:
- Hyponatremia (low sodium): A sodium level below 135 mEq/L. Kidney.org
- Hypernatremia (high sodium): A sodium level above 145 mEq/L. Merck Manuals
Urine Sodium Test
A urine sodium test measures the amount of sodium excreted in your urine. This test can be helpful in conjunction with a blood test to assess overall sodium balance and identify potential causes of imbalances. Sodium is present in many foods, particularly processed foods. Saint Luke's Health System
Dietary Sodium Tracking
While not a direct measure of body sodium levels, tracking your dietary sodium intake can be beneficial in managing your overall sodium balance. Resources like the American Heart Association provide tools to help monitor sodium consumption. American Heart Association
