SHEET /m/tryptophan · PubChem CID 6305 · CAS 73-22-3 · REV 2026.07
Tryptophan from source
C11H12N2O2 · 204.22 g/mol
L-tryptophan · L-Tryptophane · Tryptophane · (S)-Tryptophan
What is Tryptophan?
An amino acid from everyday protein foods that your body converts, step by step, into the mood and sleep molecules serotonin and melatonin. from source
Fig. 1 · 2D structure RDKit
C1=CC=C2C(=C1)C(=CN2)C[C@@H](C(=O)O)N
Where you'll find it
Not yet mapped to everyday foods or products.
The dose makes the poison inferred
A reported rat other LD50 for Tryptophan is 1,634 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
“The dose makes the poison” is a cross-species estimate shown as neutral science, not a threshold anyone should act on. Real toxicity depends on the person, not body mass alone.
Toxicity & hazards
Toxicity · LD50
1,634 mg/kg · low toxicity · LD50 rat other from source
The dose lens above scales this to a body weight.
1 more reported value
- 4,800 mg/kgLD50 · other · mouse
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