The short answer
No use has passed JIVANA's study-level evidence review yet.
- Evidence and scope
- Research gathered — evidence review pending
This status does not grade the ingredient for every goal, outcome, or person.
- Important limitation
- No efficacy conclusion has passed JIVANA's study-level review yet. The linked research index is for discovery, not a benefit claim.
- Before deciding
- Identity, dose, interactions, product quality, and regulatory status still require review. Do not use this provisional page to decide whether to take it.
02 / EVIDENCE
What the research says
We keep supportive, mixed, negative, safety, and contextual findings together. The headline never replaces the underlying papers.
This research-index page is live so the topic, source trail, and evidence boundaries are visible. Individual studies have not yet passed the JIVANA extraction and review process, so we do not manufacture an efficacy conclusion or research count from broad search results.
Unscreened discovery appendix—not evidence91 candidate publicationsSearch run: Aug 21, 2026
Complete for the displayed PubMed query at the search timestamp—not for all databases or every possible synonym. Candidates can be irrelevant, duplicate the same study, or report negative findings. They are never summed as evidence or participants until screened.
03 / SOURCES
Start with the source material
The live search is for discovery only. Search-result counts change and are not included in the audited totals above.
Recent PubMed discovery recordsDirect links to the first 12 records returned by the reproducible search. These are discovery candidates—not reviewed summaries or a count of supportive findings.
- The Effect of Griffonia simplicifolia on Pain Intensity, Central and Peripheral Sensitization, and Pain Modulation in Healthy Volunteers-A Randomized, Double-Blinded, Placebo-Controlled Crossover Trial.Schlemmer AJ, Hammer S, Fandler-Höfler S et al. · 2026 · Nutrients · PMID 42197069Open on PubMed ↗
- The Impact of 5-Hydroxytryptophan Supplementation on Cognitive Function and Mood in Singapore Older Adults: A Randomized Controlled Trial.Li S, Sutanto CN, Xia X et al. · 2025 · Nutrients · PMID 40944161Open on PubMed ↗
- Investigating genetic links between biological aging and adverse pregnancy outcomes.Sun N, Yang K, Wang H et al. · 2025 · Biogerontology · PMID 39920341Open on PubMed ↗
- The impact of 5-hydroxytryptophan supplementation on sleep quality and gut microbiota composition in older adults: A randomized controlled trial.Sutanto CN, Xia X, Heng CW et al. · 2024 · Clinical nutrition (Edinburgh, Scotland) · PMID 38309227Open on PubMed ↗
- The Effects of 5-HTP on Body Composition: An 8-Week Preliminary RCT.Evans C, Mekhail V, Curtis J et al. · 2023 · Journal of dietary supplements · PMID 35583055Open on PubMed ↗
- Preliminary finding of a randomized, double-blind, placebo-controlled, crossover study to evaluate the safety and efficacy of 5-hydroxytryptophan on REM sleep behavior disorder in Parkinson's disease.Meloni M, Figorilli M, Carta M et al. · 2022 · Sleep & breathing = Schlaf & Atmung · PMID 34403081Open on PubMed ↗
- Tryptophan-enriched diet or 5-hydroxytryptophan supplementation given in a randomized controlled trial impacts social cognition on a neural and behavioral level.Zamoscik V, Schmidt SNL, Bravo R et al. · 2021 · Scientific reports · PMID 34737364Open on PubMed ↗
- Gut bacteria-derived 5-hydroxyindole is a potent stimulant of intestinal motility via its action on L-type calcium channels.Waclawiková B, Bullock A, Schwalbe M et al. · 2021 · PLoS biology · PMID 33481771Open on PubMed ↗
- EPA and DHA as markers of nutraceutical treatment response in major depressive disorder.van der Burg KP, Cribb L, Firth J et al. · 2020 · European journal of nutrition · PMID 31555976Open on PubMed ↗
- Efficacy and safety of 5-Hydroxytryptophan on levodopa-induced motor complications in Parkinson's disease: A preliminary finding.Meloni M, Puligheddu M, Sanna F et al. · 2020 · Journal of the neurological sciences · PMID 32464351Open on PubMed ↗
- Efficacy and safety of 5-hydroxytryptophan on depression and apathy in Parkinson's disease: a preliminary finding.Meloni M, Puligheddu M, Carta M et al. · 2020 · European journal of neurology · PMID 32067288Open on PubMed ↗
- PK/PD modeling of 5-hydroxytryptophan (5-HTP) challenge test with cortisol measurement in serum and saliva.Guan Z, Jacobs G, van Pelt H et al. · 2020 · Pharmacology research & perspectives · PMID 32168433Open on PubMed ↗
04 / EXPERT CONTEXT
Expert context—not evidence
Expert positions are dated context—not scientific evidence. They never raise the evidence status or become consensus by repetition.
No direct, source-verified endorsement is currently recorded. Research authorship or discussion alone is not treated as endorsement.