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Tryptophan
Blood
Tryptophan
Also known as: Trp, Serum Tryptophan
COMMON RANGE
21 – 108
µmol/L
12.3
117
M
Mayo Clinic Laboratories
Adult
↗
See all sources ↓
CONVERT & COMPARE
µmol/L
=
65
umol/L
=
65
mcmol/L
Reference ranges across 10+ sources
Adult reference ranges from 2 entries across 2 named sources, shown in µmol/L. Compare side-by-side.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
M
Mayo Clinic Laboratories
All
≥18y
21 – 108 µmol/L
↗
L
Labcorp
All
≥18y
23.5 – 93 µmol/L
↗
M
Mayo Clinic Laboratories
All · ≥18y
↗
21 – 108 µmol/L
L
Labcorp
All · ≥18y
↗
23.5 – 93 µmol/L
Related biomarkers
Often tested alongside tryptophan or part of the same panel.
White Blood Cells (WBC)
Blood
Red Blood Cells (RBC)
Blood
Hemoglobin (Hgb)
Blood
Hematocrit (Hct)
Blood
Platelets (PLT)
Blood
Mean Corpuscular Volume (MCV)
Blood
Sources
M
Mayo Clinic Laboratories
L
Labcorp
Last updated 2026-05-02
This page aggregates publicly available reference data and clinical information from Mayo Clinic Laboratories and other sources. For general wellness information only — not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.
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