Get precise insight into your body’s sodium handling and kidney health with Scan4Health’s 24-Hour Urinary Sodium (Na) Test. This essential diagnostic measure assesses how much sodium you excrete in your urine over a full day—a key marker of kidney function, blood pressure management, and dietary salt intake. Scan4Health’s expert team guides you through each step, ensuring a smooth testing experience and rapid, reliable results for better care and prevention.

• Routine Preparation: No fasting is required. Follow your usual diet and fluid intake unless your doctor instructs otherwise.
• Medication Guidance: Certain medications—such as diuretics, NSAIDs, corticosteroids, and antibiotics—may affect results. Share a complete list with your physician and only adjust medications if directed.
• Sample Collection: Begin your test by discarding your first urination after waking. Collect every drop of urine for the next 24 hours into the provided container. Include your first urination the following morning to complete the process.
• Storage: Keep the sample container refrigerated or on ice throughout collection for best accuracy.
• Labeling/Forms: Note your start and end times, and complete any lab forms provided for accurate reporting.
• Avoid Alcohol: Do not drink alcohol before or during the urine collection unless given specific clearance by your doctor.
• Inform of Health Changes: Let staff know if you develop an illness, become dehydrated, have undergone recent radiology scans with dye, or have begun new medications.

This test measures the total amount of sodium your kidneys excrete into the urine in a full day. Sodium is a crucial mineral for regulating fluid balance, nerve impulses, and muscle function. Still, abnormal handling can lead to high blood pressure, heart and kidney disease, and complications from certain medical conditions. The 24-hour sodium test evaluates your diet and kidney function and helps your doctor tailor treatment—especially in heart failure, hypertension, kidney disease, or suspected low or high sodium levels. After collecting urine for 24 hours, lab technicians analyze its sodium content using advanced chemical methods. Typical adult values range from 100–260 mmol/24 hours, but your doctor will interpret the results based on your medical history, symptoms, age, and other individual factors. Abnormal findings may mean you are consuming too much or too little sodium, that kidney function is impaired, or that there are underlying hormonal or blood pressure disorders affecting sodium regulation. The test is essential for making real-world adjustments to treatment, dietary plans, or salt restriction recommendations.

Choose Scan4Health for expert kidney and metabolic testing. Book your 24-Hour Urinary Sodium Test today for actionable answers and healthier living.