Osmolality by age and sex
How the usual range for osmolality changes with age, as labs print it.
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The usual range at every age
The reference range labs print, for each age group. Ranges differ a little between labs, so the range on your own report is the one your result is judged against.
Use the left and right arrow keys to step through the age groups. Every range is also in the table below.
| Who | Usual range |
|---|---|
| under 18 | 275–295 mOsm/kg |
| 18–60 | 275–295 mOsm/kg |
| 61+ | 280–301 mOsm/kg |
Sources: Mayo Clinic Laboratories (catalog copy hosted by Schneck Medical Center), Labcorp, ARUP Laboratories, Merck Manual Professional Version, MedlinePlus (US National Library of Medicine)