5 Htp
Product Forms
Dose Distribution
Top Brands
Claims on Labels
Top-Rated 5 Htp Products
Evidence Summary
5-HTP (5-Hydroxytryptophan) is a precursor to serotonin that has been studied for its potential role in regulating mood, sleep, and cognitive function. Research suggests moderate benefits for sleep quality and mood in older adults, though evidence for other conditions like fibromyalgia remains less definitive.
Evidence by Condition
Meta-analyses and RCTs suggest 5-HTP may serve as a natural alternative for treating unipolar depression and improving mood in older adults.
Recent RCT evidence indicates that 5-HTP supplementation can improve sleep quality and influence gut microbiota composition in older adults.
Research has explored 5-HTP as part of combination pharmacotherapy, but specific standalone efficacy for fibromyalgia is not clearly established in the provided reviews.
Available systematic reviews focus more on the efficacy of triptans and general prevention strategies in pediatric populations rather than 5-HTP specifically.
Effective Doses
Dose ranges are not specified in the provided research abstracts.
Key Findings
- 5-HTP supplementation can impact sleep quality and gut microbiota composition in older adults (PMID: 38309227).
- 5-HTP has been investigated for its impact on cognitive function and mood in older adults (PMID: 40944161).
- Meta-analyses have evaluated 5-HTP and tryptophan as natural alternatives to traditional antidepressants for unipolar depression (PMID: 11687048, 12169147).
Limitations
Much of the high-level evidence for depression is based on older studies, and there is a lack of recent, large-scale RCTs specifically targeting 5-HTP for pediatric migraine or fibromyalgia.
Safety & Interactions
Potential risk of serotonin syndrome; caution is advised when combining with other serotonergic agents.
AI-generated summary from 21 peer-reviewed studies. Not medical advice. Always consult a healthcare provider.
Drug-Supplement Interactions
⚠️ This information is for educational purposes only and does not constitute medical advice. Always consult your healthcare provider before combining supplements with medications.
Claims vs. Evidence
| Claim Type | % of Products | Evidence Required | Status |
|---|---|---|---|
| All Other | 99% | Tier D (Unclassified) | ✅ Supported |
| Structure/Function | 78% | Tier C (DSHEA Structure/Function (no pre-approval)) | ✅ Supported |
| Nutrient | 52% | Tier D (Unknown) | ✅ Supported |
Research by Topic
Research Evidence (21)
**Thorpe et al., 2018** | Cochrane Database Syst Rev | Systematic Review Thorpe Joelle, Shum Bonnie, ... Gilron Ian. Combination pharmacotherapy for the treatment of fibromyalgia in adults. Cochrane Database Syst Rev. 2018-Feb-19;2(2):CD010585. doi:1...
BACKGROUND: 5 Hydroxytryptophan (5-HTP) and tryptophan are so-called natural alternatives to traditional antidepressants, used to treat unipolar depression and dysthymia. OBJECTIVES: To determine whether 5-HTP and tryptophan are more effective than p...
BACKGROUND: 5 Hydroxytryptophan (5-HTP) and tryptophan are so-called natural alternatives to traditional antidepressants, used to treat unipolar depression and dysthymia. OBJECTIVES: To determine whether 5-HTP and tryptophan are more effective than p...
**Sutanto et al., 2024** | Clin Nutr | Rct Sutanto Clarinda Nataria, Xia Xuejuan, ... Kim Jung Eun. The impact of 5-hydroxytryptophan supplementation on sleep quality and gut microbiota composition in older adults: A randomized controlled trial. Clin...
**Li et al., 2025** | Nutrients | Rct Li Shuqi, Sutanto Clarinda Nataria, ... Kim Jung Eun. The Impact of 5-Hydroxytryptophan Supplementation on Cognitive Function and Mood in Singapore Older Adults: A Randomized Controlled Trial. Nutrients. 2025-Aug...
**Chanchlani et al., 2023** | Indian Pediatr | Systematic Review Chanchlani Roshan, Agrawal Amit, ... Hafsa Shaik Nida. The Efficacy of Different Triptans for the Treatment of Acute Headache in Pediatric Migraine: A Systematic Review. Indian Pediatr....
**Lin et al., 2025** | Front Pharmacol | Systematic Review Lin Shaohong, Ye Ruming, ... Zhang Huiyue. The effect of therapeutic massage combined with conventional therapy in children with functional dyspepsia: a systematic review and meta-analysis. F...
**Bruni et al., 2010** | BMJ Clin Evid | Systematic Review Bruni Oliveiero, Novelli Luana. Sleep disorders in children. BMJ Clin Evid. 2010-Sep-27;2010 INTRODUCTION: Sleep disorders may affect between 20% and 30% of young children, and include proble...
**Javelle et al., 2020** | Nutr Rev | Meta Analysis Javelle Florian, Lampit Amit, ... Zimmer Philipp. Effects of 5-hydroxytryptophan on distinct types of depression: a systematic review and meta-analysis. Nutr Rev. 2020-Jan-01;78(1):77-88. doi:10.109...
**Sun et al., 2025** | Biogerontology | Meta Analysis Sun Ning, Yang Kaiyan, ... Zhou Wenbo. Investigating genetic links between biological aging and adverse pregnancy outcomes. Biogerontology. 2025-Feb-07;26(2):56. doi:10.1007/s10522-025-10198-y Obs...
**Carrillo et al., 2009** | Psychopharmacology (Berl) | Meta Analysis Carrillo Maria, Ricci Lesley A, ... Melloni Richard H. The effect of increased serotonergic neurotransmission on aggression: a critical meta-analytical review of preclinical studie...
**Victor et al., 2003** | Cochrane Database Syst Rev | Systematic Review Victor S, Ryan S W. Drugs for preventing migraine headaches in children. Cochrane Database Syst Rev. 2003(4):CD002761 BACKGROUND: It has been estimated that about ten per cent o...
**Haberzettl et al., 2013** | Behav Brain Res | Systematic Review Haberzettl Robert, Bert Bettina, ... Fox Meredith A. Animal models of the serotonin syndrome: a systematic review. Behav Brain Res. 2013-Nov-01;256:328-45. doi:10.1016/j.bbr.2013.08.04...
**Baraldi et al., 2012** | J Clin Psychopharmacol | Systematic Review Baraldi Sara, Hepgul Nilay, ... Pariante Carmine M. Symptomatic treatment of interferon-α-induced depression in hepatitis C: a systematic review. J Clin Psychopharmacol. 2012-Aug;3...
**Shaw et al., 2002** | Aust N Z J Psychiatry | Meta Analysis Shaw Kelly, Turner Jane, Del Mar Christopher. Are tryptophan and 5-hydroxytryptophan effective treatments for depression? A meta-analysis. Aust N Z J Psychiatry. 2002-Aug;36(4):488-91 OBJE...
**Trujillo-Martín et al., 2009** | Mov Disord | Systematic Review Trujillo-Martín M Mar, Serrano-Aguilar Pedro, ... Carrillo-Fumero Romen. Effectiveness and safety of treatments for degenerative ataxias: a systematic review. Mov Disord. 2009-Jun-15;2...
**Naglich et al., 2018** | CNS Drugs | Systematic Review Naglich Andrew C, Lin Austin, ... Adinoff Bryon H. Systematic Review of Combined Pharmacotherapy for the Treatment of Alcohol Use Disorder in Patients Without Comorbid Conditions. CNS Drugs. 20...
INTRODUCTION: Melatonin plays a key role in sleep regulation. Combining melatonin with its precursors, L-tryptophan (LT) and 5-Hydroxytryptophan (5HTP), may influence sleep-related outcomes, but evidence in children with neurodevelopmental disorders ...
**Meloni et al., 2020** | Eur J Neurol | Rct Meloni M, Puligheddu M, ... Defazio G. Efficacy and safety of 5-hydroxytryptophan on depression and apathy in Parkinson's disease: a preliminary finding. Eur J Neurol. 2020-May;27(5):779-786. doi:10.1111/e...
**Bruni et al., 2004** | Eur J Pediatr | Rct Bruni Oliviero, Ferri Raffaele, ... Verrillo Elisabetta. L -5-Hydroxytryptophan treatment of sleep terrors in children. Eur J Pediatr. 2004-Jul;163(7):402-7 UNLABELLED: To test the hypothesis that the admi...
**Nardini et al., 1983** | Int J Clin Pharmacol Res | Rct Nardini M, De Stefano R, ... Battistini N. Treatment of depression with L-5-hydroxytryptophan combined with chlorimipramine, a double-blind study. Int J Clin Pharmacol Res. 1983;3(4):239-50 A ...
Related Supplements
Frequently Asked Questions
What is 5-HTP and what are its primary functions?
5-HTP (5-Hydroxytryptophan) is a precursor to serotonin that is studied for its potential role in regulating sleep, mood, and cognitive function.
Can 5-HTP help with depression and mood improvement?
There is moderate evidence suggesting that 5-HTP may serve as a natural alternative for treating unipolar depression and improving mood, particularly in older adults.
Does 5-HTP supplementation affect sleep quality?
Yes, recent research indicates that 5-HTP supplementation can improve sleep quality in older adults and may also influence the composition of gut microbiota.
Is 5-HTP an effective standalone treatment for fibromyalgia?
Currently, there is insufficient evidence to establish the standalone efficacy of 5-HTP for the treatment of fibromyalgia.
Is there evidence that 5-HTP can prevent migraines?
Available systematic reviews do not provide sufficient evidence regarding the specific efficacy of 5-HTP for migraine prevention.
What are the safety precautions for taking 5-HTP?
There is a potential risk of serotonin syndrome when using 5-HTP. Therefore, caution is advised when combining it with other serotonergic agents.
Answers generated from research evidence. Not medical advice.