5-HTP ： 入眠困難
D 研究 予備的な研究（実験室研究、症例報告）のみが存在します。7件の研究に基づく。7件中7件の研究で肯定的な効果が示されている。
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D
結論
There is not yet enough human research to confirm that 5-HTP helps you fall asleep faster, though early animal research is encouraging.
- All 7 studies are animal or preclinical studies with no human trial data
- Evidence grade is D, indicating very limited evidence
- 5-HTP works through the serotonin system, which plays a role in sleep onset
- Human clinical trials are needed before recommendations can be made
Key Study Findings
Animal study
Ginsenoside Rg1 alleviates PCPA-induced insomnia by inhibiting NLRP3 inflammasome activation and pyroptosis through the Nrf2/HO-1 …
Dose: None
vs: Placebo
効果: None
None
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
効果: None
None
animal study (preclinical)
Study on the hypnotic effect of rare protopanaxadiol-type and protopanaxatriol-type ginsenosides.
Dose: up to 96 mg/kg
vs: Placebo
効果: None
None
animal study (preclinical)
Two combined amino acids promote sleep activity in caffeine-induced sleepless model systems.
Dose: not fully specified (dose ranges tested in Drosophila, ICR mice, and SD rats)
vs: Placebo
効果: None
p < 0.001 (combined GABA/5-HTP
animal study (preclinical)
Flos Albiziae aqueous extract and its active constituent quercetin potentiate the hypnotic effect of pentobarbital …
Dose: various doses; pentobarbital 50 mg/kg (full dose) or 28 mg/kg (sub-hypnotic dose) IP
vs: Placebo
効果: None
None
In Vitro
Pharmacological evaluation of sedative and hypnotic effects of schizandrin through the modification of pentobarbital-induced sleep …
Dose: 5-45 mg/kg i.p. schizandrin
vs: Placebo
効果: Dose-dependent decrease in sleep latency and increase in sleep duration
None
Key Statistics
7
研究数
--
参加者数
↑
Positive
D
グレード
Referenced Papers
Psychopharmacology
2025
5 件の引用
International immunopharmacology
2025
1 件の引用
Study on the hypnotic effect of rare protopanaxadiol-type and protopanaxatriol-type ginsenosides.
Other
RSC advances
2019
13 件の引用
Nutrition research and …
2018
12 件の引用
Biomedical reports
2015
12 件の引用
European journal of …
2014
43 件の引用
Pharmacology, biochemistry, and …
2008
76 件の引用
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
一般的な使用量
- sleep:
- 100-300 mg, 30-45 min before bed
上限量： Not established; serotonin syndrome risk with SSRIs
研究で検討された用量
| 用量 | 期間 | 効果 | N |
|---|---|---|---|
| None | -- | Positive | -- |
| Cinnamic acid (CA) administered to rats (dose not specified) | -- | Positive | -- |
| up to 96 mg/kg | -- | Positive | -- |
| not fully specified (dose ranges tested in Drosophila, ICR mice, and SD rats) | -- | Positive | -- |
| various doses; pentobarbital 50 mg/kg (full dose) or 28 mg/kg (sub-hypnotic dose) IP | -- | Positive | -- |
| 5-45 mg/kg i.p. schizandrin | -- | Positive | -- |
| Spinosin various doses; pentobarbital 45 mg/kg or 28 mg/kg i.p.; 5-HTP 2.5 mg/kg i.p.; PCPA 300 mg/k | -- | Positive | -- |
推奨摂取タイミング： 30-45 minutes before bed
Safety & Side Effects
報告されている副作用
- ⚠ Nausea
- ⚠ Diarrhea
- ⚠ Heartburn
- ⚠ Stomach pain
- ⚠ Drowsiness
既知の相互作用
- ● SSRIs/SNRIs — serious risk of serotonin syndrome
- ● MAOIs — dangerous serotonin accumulation
- ● Tramadol — increased serotonin syndrome risk
- ● Carbidopa — may cause scleroderma-like skin changes
耐容上限摂取量： Not established; serotonin syndrome risk with SSRIs
サプリメントの摂取を開始する前に、必ず医療専門家にご相談ください。
Frequently Asked Questions
Does 5-HTP help with 入眠困難?
Based on 7 studies with 0 participants, there is preliminary evidence that needs more research that 5-HTP may support 入眠困難 management. Our evidence grade is D (Very Early Research).
How much 5-HTP should I take for 入眠困難?
Studies have used various dosages. A commonly studied range is 100-300 mg, 30-45 min before bed. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of 5-HTP?
Reported side effects may include Nausea, Diarrhea, Heartburn, Stomach pain. 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 入眠困難?
We rate the evidence as Grade D (Very Early Research). This rating is based on 7 peer-reviewed studies with 0 total participants. The overall direction of effect is positive.
Related Evidence
References
- [1] Jingyi Li et al.. Psychopharmacology (Berl). 2025. Ginsenoside Rg1 alleviates PCPA-induced insomnia by inhibiting NLRP3 inflammasome activation and pyroptosis through the Nrf2/HO-1 pathway in mice. doi:10.1007/s00213-025-06828-5 PubMed
- [2] 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
- [3] Ning Mou et al.. RSC Adv. 2019. Study on the hypnotic effect of rare protopanaxadiol-type and protopanaxatriol-type ginsenosides. doi:10.1039/c9ra01549c PubMed
- [4] Ki-Bae Hong et al.. Nutr Res Pract. 2018. Two combined amino acids promote sleep activity in caffeine-induced sleepless model systems. doi:10.4162/nrp.2018.12.3.208 PubMed
- [5] Meng-Fei Ye et al.. Biomed Rep. 2015. Flos Albiziae aqueous extract and its active constituent quercetin potentiate the hypnotic effect of pentobarbital via the serotonergic system. doi:10.3892/br.2015.518 PubMed
- [6] Chenning Zhang et al.. Eur J Pharmacol. 2014. Pharmacological evaluation of sedative and hypnotic effects of schizandrin through the modification of pentobarbital-induced sleep behaviors in mice. doi:10.1016/j.ejphar.2014.09.012 PubMed
- [7] Li-En Wang et al.. Pharmacol Biochem Behav. 2008. Spinosin, a C-glycoside flavonoid from semen Zizhiphi Spinozae, potentiated pentobarbital-induced sleep via the serotonergic system. doi:10.1016/j.pbb.2008.03.022 PubMed
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