Sodium
Sodium is the main extracellular electrolyte and governs fluid balance, nerve impulse transmission, and muscle contraction. Low sodium (hyponatremia) can cause confusion, seizures, and falls and may reflect heart failure, SIADH, diuretic use, or excessive water intake;high sodium (hypernatremia) usually indicates dehydration or impaired thirst response and can cause neurologic symptoms.
20 of 22 providers
Electrolytes &Minerals
fluid balance
What is Sodium?
Sodium is the main extracellular electrolyte and governs fluid balance, nerve impulse transmission, and muscle contraction. Low sodium (hyponatremia) can cause confusion, seizures, and falls and may reflect heart failure, SIADH, diuretic use, or excessive water intake;high sodium (hypernatremia) usually indicates dehydration or impaired thirst response and can cause neurologic symptoms.
Why It Matters
Critical for nerve and muscle function, fluid balance, and blood pressure regulation. Abnormal levels can cause weakness, confusion, and cardiac issues.
Which Providers Test Sodium?
Full Provider Comparison
| Provider | Includes | Annual Cost | Biomarkers |
|---|---|---|---|
 Superpower | ✓ | $199 | 100+ (150 with ratios) |
 WHOOP Advanced Labs | ✓ | $349 | 65 |
 Labcorp OnDemand | ✓ | $398 | 40+ |
| ✓ | $486 | 40+ | |
| ✓ | $449 | 288 | |
| ✓ | $349 | 100+ | |
| ✓ | $829 | 54 | |
 Function Health | ✓ | $365 | 160+ |
| ✓ | $250 | 65 | |
| ✓ | $495 | 80+ | |
| ✓ | $895 | 100+ | |
| ✓ | $1950 | 130+ | |
| ✓ | $375 | 95+ | |
| — | $Varies | 75+ | |
| ✓ | $190 | 100+ | |
| ✓ | $99 | 50 | |
| — | $124 | 60 | |
| ✓ | $349 | 130+ | |
| ✓ | $349 | 80+ | |
| ✓ | $375 | 85 | |
| ✓ | $700 | 128 | |
| ✓ | $99 | 100+ |
Frequently Asked Questions
What is Sodium?
Sodium is the main extracellular electrolyte and governs fluid balance, nerve impulse transmission, and muscle contraction. Low sodium (hyponatremia) can cause confusion, seizures, and falls and may reflect heart failure, SIADH, diuretic use, or excessive water intake;high sodium (hypernatremia) usually indicates dehydration or impaired thirst response and can cause neurologic symptoms.
What is the optimal range for Sodium?
The standard reference range for Sodium is fluid balance. Optimal ranges may differ based on individual health goals and expert recommendations.
Which blood test providers include Sodium?
20 out of 22 blood testing providers include Sodium in their panels. This biomarker is widely available across major providers.
What category does Sodium fall under?
Sodium is categorized under Electrolytes &Minerals. This category includes biomarkers that help assess related aspects of health and wellness.
Looking to optimize your levels? YouBoost rates supplement and nutrition interventions by evidence strength.
Medical Disclaimer
This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs.
Last reviewed:2026-04-12