LabwiseLabwise › Tests › Metabolic panel (CMP)
OsmolalitymOsm/kg
Osmolality measures the concentration of dissolved particles in the blood, mostly sodium, glucose and urea.
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What Osmolality measures
Osmolality measures the concentration of dissolved particles in the blood, mostly sodium, glucose and urea.
If your Osmolality is low
Osmolality below the range means the blood is more dilute, commonly associated with low sodium, excess water intake or hormones that retain water.
Commonly associated with
- Low sodium
- Excess fluid intake
- Water-retaining hormones
- Some medications
If your Osmolality is high
Osmolality above the range means the blood is more concentrated, commonly associated with dehydration, high glucose or high sodium.
Commonly associated with
- Dehydration
- High glucose
- High sodium
- Alcohol or certain toxins
Typical reference range
| Group | Typical range |
|---|---|
| Adults | 275 – 295 mOsm/kg |
Typical adult values used by many US labs. Your own report prints the range your lab validated for its method, and that range is the one that counts. Labwise always uses the printed range first.
If it is within range
Your osmolality is within the range printed by your lab.
Also listed as
Osmolality, Serum, Serum Osmolality, Osmolality, Plasma
Related tests
This page is general information about what a laboratory test measures and what results outside a reference range are commonly associated with. It is not medical advice, does not diagnose any condition and does not replace your clinician. Discuss your results with your healthcare provider.