Triptofano per Difficoltà di addormentamento

Basato su 19 studi (1 meta-analysis, 1 RCT) con 96 partecipanti totali. 16/19 studi mostrano effetti positivi.

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In sintesi

Tryptophan shows promising signs for helping people fall asleep faster, supported by a strong biological rationale, though the studies so far have been quite small.

84% of 19 studies show positive effects — a very consistent finding
Works through conversion to serotonin and then melatonin in the brain
Total participant count of only 96 limits the strength of conclusions
Includes 1 meta-analysis and 1 RCT — larger trials are needed

Key Study Findings

Review

Effects of L-tryptophan on sleepiness and on sleep.

Dose: 1 g or more vs: Placebo Effetto: Increase in subjective sleepiness; decrease in sleep latency

review

Unraveling the connection between the Mediterranean diet and sleep health: from biological mechanisms to clinical …

Dose: Mediterranean diet (high adherence vs. low adherence); polyphenols, omega-3, fiber as key components vs: Placebo Effetto: None None

Animal study

Ginsenoside Rg1 alleviates PCPA-induced insomnia by inhibiting NLRP3 inflammasome activation and pyroptosis through the Nrf2/HO-1 …

Dose: None vs: Placebo Effetto: 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 Effetto: None None

Animal study

Lactobacillales derived from traditional Xizang dairy products improve insomnia and restore neurotransmitter-metabolic profiles via gut …

Dose: Mixed probiotics (Lactobacillus helveticus L551, Lacticaseibacillus paracasei L578, Streptococcus th vs: Placebo Effetto: None None

Animal study

Wendan Decoction exerts therapeutic effects on insomnia by regulating gut microbiota and tryptophan metabolism.

Dose: None vs: Placebo Effetto: None None

Key Statistics

Studi

Partecipanti

↑

Positive

Grado

Referenced Papers

Effects of L-tryptophan on sleepiness and on sleep. Review

Journal of psychiatric … None 102 citazioni

Ginsenoside Rg1 alleviates PCPA-induced insomnia by inhibiting NLRP3 inflammasome activation and pyroptosis through the Nrf2/HO-1 pathway in mice. Other

Psychopharmacology 2025 5 citazioni

Wendan Decoction exerts therapeutic effects on insomnia by regulating gut microbiota and tryptophan metabolism. Other

Phytomedicine : international … 2025 5 citazioni

Lactobacillales derived from traditional Xizang dairy products improve insomnia and restore neurotransmitter-metabolic profiles via gut microbiota in PCPA-induced mice. Other

Microbiological research 2025 3 citazioni

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

International immunopharmacology 2025 1 citazioni

Unraveling the connection between the Mediterranean diet and sleep health: from biological mechanisms to clinical implications. Review

Sleep & breathing … 2025

Cannabidiol Exerts Sedative and Hypnotic Effects in Normal and Insomnia Model Mice Through Activation of 5-HT1A Receptor. Other

Neurochemical research 2024 14 citazioni

The therapeutic potential of Ziziphi Spinosae Semen and Polygalae Radix in insomnia management: Insights from gut microbiota and serum metabolomics … Other

Journal of ethnopharmacology 2024 13 citazioni

Shen Yuan extract exerts a hypnotic effect via the tryptophan/5-hydroxytryptamine/melatonin pathway in mice. Other

Journal of ethnopharmacology 2024 13 citazioni

Screening the effective components of Suanzaoren decoction on the treatment of chronic restraint stress induced anxiety-like mice by integrated chinmedomics … Other

Phytomedicine : international … 2023 33 citazioni

The impact of tryptophan supplementation on sleep quality: a systematic review, meta-analysis, and meta-regression. Meta-Analysis

Nutrition reviews 2022 68 citazioni

Study on the hypnotic effect of rare protopanaxadiol-type and protopanaxatriol-type ginsenosides. Other

RSC advances 2019 13 citazioni

Insomnia in Elderly Patients: Recommendations for Pharmacological Management. Review

Drugs & aging 2018 131 citazioni

Two combined amino acids promote sleep activity in caffeine-induced sleepless model systems. Other

Nutrition research and … 2018 12 citazioni

Clinical Practice Guideline for the Pharmacologic Treatment of Chronic Insomnia in Adults: An American Academy of Sleep Medicine Clinical Practice … Other

Journal of clinical … 2017 1097 citazioni

Flos Albiziae aqueous extract and its active constituent quercetin potentiate the hypnotic effect of pentobarbital via the serotonergic system. Other

Biomedical reports 2015 12 citazioni

Pharmacological evaluation of sedative and hypnotic effects of schizandrin through the modification of pentobarbital-induced sleep behaviors in mice. Other

European journal of … 2014 43 citazioni

Spinosin, a C-glycoside flavonoid from semen Zizhiphi Spinozae, potentiated pentobarbital-induced sleep via the serotonergic system. Other

Pharmacology, biochemistry, and … 2008 76 citazioni

Chronic insomnia: effects of tryptophan, flurazepam, secobarbital, and placebo. RCT

Psychopharmacology 1983 25 citazioni

Dosage & Usage

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

Dosaggi di uso comune

sleep:: 250-1,000 mg, before bed

Limite massimo: Not established; previously recalled (1989) due to contamination

Dosaggi studiati nella ricerca

Dosaggio	Durata	Effetto	N
1 g or more	--	Positive	--
Mediterranean diet (high adherence vs. low adherence); polyphenols, omega-3, fiber as key components	--	Positive	--
None	--	Positive	--
Cinnamic acid (CA) administered to rats (dose not specified)	--	Positive	--
Mixed probiotics (Lactobacillus helveticus L551, Lacticaseibacillus paracasei L578, Streptococcus th	--	Positive	--
None	--	Positive	--
cannabidiol (CBD) at various doses administered to mice	--	Positive	--
not specified (intragastric administration)	--	Positive	--

Momento migliore per l'assunzione: 30-60 minutes before bed, ideally on a light stomach

Safety & Side Effects

Effetti collaterali segnalati

⚠ Nausea
⚠ Diarrhea
⚠ Drowsiness
⚠ Dry mouth
⚠ Blurred vision

Interazioni note

● SSRIs/SNRIs — risk of serotonin syndrome
● MAOIs — dangerous serotonin accumulation
● Sedatives — additive drowsiness

Livello di assunzione massimo tollerabile: Not established; previously recalled (1989) due to contamination

Consultare sempre il proprio medico prima di iniziare qualsiasi integratore.Consultate sempre il vostro medico prima di iniziare qualsiasi integratore.

Frequently Asked Questions

Does Triptofano help with Difficoltà di addormentamento?

Based on 19 studies with 96 participants, there is moderate evidence from clinical studies that Triptofano may support Difficoltà di addormentamento management. Our evidence grade is B (Good Evidence).

How much Triptofano should I take for Difficoltà di addormentamento?

Studies have used various dosages. A commonly studied range is 250-1,000 mg, before bed. Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of Triptofano?

Reported side effects may include Nausea, Diarrhea, Drowsiness, Dry mouth. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

How strong is the evidence for Triptofano and Difficoltà di addormentamento?

We rate the evidence as Grade B (Good Evidence). This rating is based on 19 peer-reviewed studies with 96 total participants. The overall direction of effect is positive.

Related Evidence

Altri ingredienti per Difficoltà di addormentamento

Magnesio glicinato A Vitamina B6 A Zinco A Melatonin A Hops A L-Theanine A

Triptofano per altre condizioni

Insonnia A

Verdetto rapido

Basato su 19 studi (1 meta-analysis, 1 RCT) con 96 partecipanti totali. 16/19 studi mostrano effetti positivi.

Evidence Strength72%

High confidence

Analisi degli studi

RCT (1)Meta (1)Other (17)

Confronta le alternative

Scoprite come si confrontano altri ingredienti per questa condizione.

Visualizza tutti gli ingredienti per Difficoltà di addormentamento

Approfondimenti

Avvertenza FDA: Queste affermazioni non sono state valutate dalla Food and Drug Administration. I prodotti e le informazioni presenti su questo sito web non sono destinati a diagnosticare, trattare, curare o prevenire alcuna malattia. I gradi di evidenza presentati si basano sulla nostra analisi della ricerca pubblicata e sottoposta a revisione paritaria e non costituiscono consulenza medica. Consultate sempre il vostro medico prima di iniziare qualsiasi regime di integrazione.