An essential amino acid and precursor to serotonin.
Tryptophan is an essential amino acid that comes from food. As well as building proteins, it is the starting material for serotonin, a brain chemical linked to mood and sleep, and for niacin (vitamin B3) and melatonin.
Plasma tryptophan is part of a full amino acid profile and reflects protein intake and how your body routes this amino acid. Low levels can reflect poor intake or increased breakdown. It is read in the context of the whole profile.
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) |
|---|---|
| Tryptophan | 26 to 61 |
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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