Is Tryptophan vegetarian?
Tryptophan
Tryptophan is an essential α-amino acid used in protein biosynthesis, containing an indole side chain, and is a precursor to serotonin, melatonin, and vitamin B3 (niacin). It can be produced via fermentation or chemical synthesis for use in cosmetics and supplements.
| Also known as | (S)-2,3-Dihydro-1H-indole-carboxylic acid, 2-Amino-3-indol-3-ylpropanoic acid, 200-795-6, L-Tryptophan, Trp, W |
|---|---|
| INCI name | Tryptophan |
| CAS number | 73-22-3 |
| EC number | 200-194-9 |
| CosIng ID | 38801 |
| Last reviewed | 9 July 2026 |
An ingredient is considered vegetarian if it avoids components derived from killing an animal.
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