Safety · Supplement
L-Tryptophan / 5-HTP: side effects, safety & interactions
The serotonergic-drug interaction is the headline risk. Historical contamination concerns with tryptophan underscore buy
- Overall grade
- Grade C
- Last revised
- 0
- graded outcomes
- 0
- references listed
Assembled by the app from other entries in this library. It adds no evidence of its own — follow the links to the entries it draws on.
The evidence in words
Safety profile
The serotonergic-drug interaction is the headline risk. Historical contamination concerns with tryptophan underscore buying reputable products.
Interactions to respect
SSRIs / SNRIs — Serotonin-syndrome risk — do not combine without a prescriber.
What L-Tryptophan / 5-HTP is
L-tryptophan is the essential amino acid precursor to serotonin and melatonin; 5-HTP is the intermediate one step closer to serotonin.
The honest bottom line
Modest for sleep and mood, and the single riskiest common supplement to combine with antidepressants. Never stack with serotonergic drugs.
Related reading
Entries that share this one's tags or conditions.
- L-Tryptophan / 5-HTPSerotonin/melatonin precursors with modest sleep-and-mood signals — and the sharpest serotonergic-drug caution on the shelf.Evidence grade C
- Apigenin: side effects, safety & interactionsBenign at these doses; theoretical mild CYP interactions at high intakes.Evidence grade C
- Glycine: side effects, safety & interactionsVery safe and well tolerated at these doses.Evidence grade B
- L-Tryptophan / 5-HTP for Mood / anxiety (5-HTP)Evidence grade C — Limited qualityEvidence grade C
Sources
This entry lists no references of its own — it is assembled from the entries it links to, whose sources are on their pages.
Last revised . A grade is this entry's reading of the evidence, not medical advice.