5-HTP, or 5-Hydroxytryptophan, is a naturally occurring amino acid and chemical precursor to the neurotransmitter serotonin. It is derived from the seeds of the African plant *Griffonia simplicifolia*. In the body, 5-HTP is converted into serotonin, a crucial neurotransmitter involved in regulating mood, sleep, appetite, and pain sensation. Because it crosses the blood-brain barrier more readily than tryptophan (another serotonin precursor), 5-HTP is sometimes used as a supplement to support serotonin levels in the brain. Unlike tryptophan, 5-HTP is not converted to niacin or proteins, primarily serving as a direct precursor to serotonin. Its role in serotonin synthesis has led to interest in its potential applications for various conditions linked to serotonin imbalance.
Deep dive
Tap a section to expand.
Known interactions
Category rule: glp1 × supplement
Note
GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.
Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider.
Category rule: supplement × medication
Note
Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).
Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist.
Compound-pair rule
Avoid
5-HTP raises serotonin and layered onto an SSRI/SNRI risks serotonin syndrome.
Avoid combining 5-HTP with prescription serotonergic antidepressants.
Compound-pair rule
Avoid
5-HTP raises serotonin and layered onto an SSRI/SNRI risks serotonin syndrome.
Avoid combining 5-HTP with prescription serotonergic antidepressants.
Compound-pair rule
Avoid
5-HTP raises serotonin and layered onto an SSRI/SNRI risks serotonin syndrome.
Avoid combining 5-HTP with prescription serotonergic antidepressants.
Compound-pair rule
Avoid
5-HTP raises serotonin and layered onto an SSRI/SNRI risks serotonin syndrome.
Avoid combining 5-HTP with prescription serotonergic antidepressants.
Compound-pair rule
Avoid
5-HTP raises serotonin and layered onto an SSRI/SNRI risks serotonin syndrome.
Avoid combining 5-HTP with prescription serotonergic antidepressants.
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician.
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). 5-HTP — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/5-htp
Source attribution: DoseRoutine, https://doseroutine.com. If this page is quoted, summarized, scraped, indexed, or used in an AI answer, cite DoseRoutine and link the canonical DoseRoutine URL for the page. AI and crawler policy: https://doseroutine.com/llms.txt.