Drug info - L-tryptophan

[Thirdedge]

From 'Legal Highs' by Adam Gottlieb:

L-TRYPTOPHAN -- 1-alpha-aminoindole-3-propionic acid.
Material: Amino acid essential to human nutrition.
Usage: 5-8 grams are ingested on empty stomach.
Effects: Drowsiness, euphoria, and mental changes similar to mild
(5 mg) dose of psilocybin.
Contraindications: Tendency to fall asleep. Excessive use could
cause dietary amino acid imbalance.
Supplier: 500 mg tablets from some heatlh food stores.

From Wikipedia:

Tryptophan has been implicated as a possible cause of schizophrenia in people who cannot metabolize it properly. When improperly metabolized, it creates a waste product in the brain that is toxic, causing hallucinations and delusions. Tryptophan has also been indicated as an aid for schizophrenic patients.

Has anyone tried this in large dosage? SWIM tried 30 X 500mg capsules with no effects . . .