5-HTP pour Appetite Control

C Preuves Preuves limitées issues de petites études, mais certains signaux positifs existent.

Double-blind RCT (n=20) found 750 mg/day reduced caloric intake by 38% and produced greater weight loss (1.5 kg vs. +0.2 kg placebo) over 5 weeks. A 12-week crossover trial confirmed reduced carbohydrate and fat intake at 900 mg/day. Sample sizes are small but findings are mechanistically consistent.

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En conclusion

Key Study Findings

Animal Study

Promotion of sleep by cinnamic acid in parachlorophenylalanine-induced insomnia in rats.

Dose: Cinnamic acid (CA) administered to rats (dose not specified) vs: Placebo Effet: None None

In Vitro

Enhanced production of 5-hydroxytryptophan through the regulation of L-tryptophan biosynthetic pathway.

Dose: recombinant E. coli strain for 5-HTP biosynthesis (engineered pathway) vs: Placebo Effet: 5-HTP production increased to 1.61 g/L (24% improvement); residual L-trp reduced from 1.66 to 0.2 g/ None

In Vitro

Engineering bacterial phenylalanine 4-hydroxylase for microbial synthesis of human neurotransmitter precursor 5-hydroxytryptophan.

Dose: engineered phenylalanine 4-hydroxylase in E. coli; whole-cell bioconversion from tryptophan vs: Placebo Effet: 1.1-1.2 g/L 5-HTP production from tryptophan in shake flasks

Observational Study

Both stimulatory and inhibitory effects of dietary 5-hydroxytryptophan and tyrosine are found on urinary excretion …

Dose: 5-hydroxytryptophan (5-HTP) and tyrosine (dietary administration, various doses) vs: Placebo Effet: 5-HTP showed marginal stimulatory influence on urinary serotonin; tyrosine primarily yielded unexpec None

Key Statistics

Études

100

Participants

↑

Positive

Note

Referenced Papers

Promotion of sleep by cinnamic acid in parachlorophenylalanine-induced insomnia in rats. Other

International immunopharmacology 2025 1 citations

Enhanced production of 5-hydroxytryptophan through the regulation of L-tryptophan biosynthetic pathway. Other

Applied microbiology and … 2020 30 citations

Engineering bacterial phenylalanine 4-hydroxylase for microbial synthesis of human neurotransmitter precursor 5-hydroxytryptophan. Other

ACS synthetic biology 2014 71 citations

Both stimulatory and inhibitory effects of dietary 5-hydroxytryptophan and tyrosine are found on urinary excretion of serotonin and dopamine in … Other

Neuropsychiatric disease and … 2009 31 citations

5-Hydroxytryptophan: a clinically-effective serotonin precursor. Review

Alternative medicine review … 1998 216 citations

Dosage & Usage

mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units

Posologies couramment utilisées

general:: 50-100 mg 1-3x/day
starting:: 50 mg/day and titrate up
appetitecontrol:: 250-300 mg/day 30 min before meals

Limite supérieure : 500 mg/day; avoid combining with SSRIs, SNRIs, MAOIs, or triptans (serotonin syndrome risk)

Posologies étudiées dans la recherche

Posologie	Durée	Effet	N
Cinnamic acid (CA) administered to rats (dose not specified)	--	Positive	--
recombinant E. coli strain for 5-HTP biosynthesis (engineered pathway)	--	Positive	--
engineered phenylalanine 4-hydroxylase in E. coli; whole-cell bioconversion from tryptophan	--	Positive	--
5-hydroxytryptophan (5-HTP) and tyrosine (dietary administration, various doses)	--	Mixed	--

Moment optimal de prise : 30 minutes before meals on an empty stomach

Safety & Side Effects

Effets indésirables signalés

⚠ Nausea
⚠ Drowsiness
⚠ GI discomfort
⚠ Serotonin syndrome risk with contraindicated medications

Interactions connues

● SSRIs (serotonin syndrome risk — NEVER combine)
● SNRIs (serotonin syndrome risk — NEVER combine)
● MAOIs (serotonin syndrome risk — NEVER combine)
● Triptans (serotonin syndrome risk)
● Carbidopa

Apport maximal tolérable : 500 mg/day; avoid combining with SSRIs, SNRIs, MAOIs, or triptans (serotonin syndrome risk)

Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.

Frequently Asked Questions

Does 5-HTP help with Appetite Control?

Based on 4 studies with 100 participants, there is limited but promising evidence that 5-HTP may support Appetite Control management. Our evidence grade is C (Some Evidence).

How much 5-HTP should I take for Appetite Control?

Studies have used various dosages. A commonly studied range is 50-100 mg 1-3x/day. Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of 5-HTP?

Reported side effects may include Nausea, Drowsiness, GI discomfort, Serotonin syndrome risk with contraindicated medications. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

How strong is the evidence for 5-HTP and Appetite Control?

We rate the evidence as Grade C (Some Evidence). This rating is based on 4 peer-reviewed studies with 100 total participants. The overall direction of effect is positive.

Autres ingrédients pour Appetite Control

Glucomannan A Prebiotics/Inulin B Whey Protein B Hoodia D

5-HTP pour d'autres pathologies

Emotional Eating C

Verdict rapide

Double-blind RCT (n=20) found 750 mg/day reduced caloric intake by 38% and produced greater weight loss (1.5 kg vs. +0.2 kg placebo) over 5 weeks. A 12-week crossover trial confirmed …

Evidence Strength52%

Moderate confidence

Synthèse des études

RCT (0)Meta (0)Other (4)

Comparer les alternatives

Découvrez comment d'autres ingrédients se comparent pour cette condition.Découvrez comment d'autres ingrédients se comparent pour cette pathologie.

Voir tous les ingrédients pour Appetite Control

En savoir plus

References

[1] Xiaona Ye et al.. Int Immunopharmacol. 2025. Promotion of sleep by cinnamic acid in parachlorophenylalanine-induced insomnia in rats. doi:10.1016/j.intimp.2025.114852 PubMed
[2] Da Xu et al.. Appl Microbiol Biotechnol. 2020. Enhanced production of 5-hydroxytryptophan through the regulation of L-tryptophan biosynthetic pathway. doi:10.1007/s00253-020-10371-y PubMed
[3] Yuheng Lin et al.. ACS Synth Biol. 2014. Engineering bacterial phenylalanine 4-hydroxylase for microbial synthesis of human neurotransmitter precursor 5-hydroxytryptophan. doi:10.1021/sb5002505 PubMed
[4] George J Trachte et al.. Neuropsychiatr Dis Treat. 2009. Both stimulatory and inhibitory effects of dietary 5-hydroxytryptophan and tyrosine are found on urinary excretion of serotonin and dopamine in … doi:10.2147/ndt.s5040 PubMed
[5] T C Birdsall. Altern Med Rev. 1998. 5-Hydroxytryptophan: a clinically-effective serotonin precursor. PubMed

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