An amino acid in the urea cycle that helps clear ammonia.
Ornithine is a non-protein amino acid that sits at the centre of the urea cycle, the pathway your body uses to clear ammonia as urea. It is also a precursor of polyamines and proline, which support cell growth and tissue repair.
Plasma ornithine is part of a full amino acid profile and helps show how well the urea cycle is working. High or low levels can point toward specific inherited urea cycle disorders, so it is read together with ammonia, citrulline, arginine and the other amino acids.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
Adult fasting plasma, guidance only:
| Analyte | Typical adult range (µmol/L) |
|---|---|
| Ornithine | 29 to 104 |
Ranges vary by laboratory and assay and are read as part of the full amino acid profile.
Results are affected by recent diet, recent protein intake, fasting state and the time of day the sample is taken.
Read as part of the full plasma amino acid profile.
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