L-Theanine per Sleep-Related Cognitive Impairment

Research suggests L-theanine supports sleep quality without sedation and may improve next-day cognitive performance through enhanced sleep architecture.

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In sintesi

Research suggests L-theanine supports sleep quality without sedation and may improve next-day cognitive performance through enhanced sleep architecture.

Key Study Findings

Randomized Controlled Trial 4.3 weeks Single-blind

Assessing brain function in stressed healthy individuals following the use of a combination of green …

Dose: None vs: placebo Outcome: Brain response to stress and quality of life Effetto: None p = 0.001

Popolazione: Chronically stressed but healthy subjects

Randomized Controlled Trial n=46 10 weeks Double-blind

L-theanine in the adjunctive treatment of generalized anxiety disorder: A double-blind, randomised, placebo-controlled trial.

Dose: 450-900 mg L-theanine daily vs: Placebo Effetto: None p=0.73 (anxiety), p=0.35 (inso

Controlled Clinical Trial n=20 8 weeks Open-label

Effects of chronic l-theanine administration in patients with major depressive disorder: an open-label study.

Dose: 250 mg/day vs: Placebo Outcome: HAMD-21 depression score, cognitive function Effetto: None pp0.007

Popolazione: Patients with major depressive disorder

Key Statistics

Studi

400

Partecipanti

↑

Positive

Grado

Referenced Papers

Assessing brain function in stressed healthy individuals following the use of a combination of green tea, Rhodiola, magnesium, and B … Other

Frontiers in nutrition 2023 3 citazioni

L-theanine in the adjunctive treatment of generalized anxiety disorder: A double-blind, randomised, placebo-controlled trial. RCT

Journal of psychiatric … 2019 46 citazioni

Effects of chronic l-theanine administration in patients with major depressive disorder: an open-label study. Other

Acta neuropsychiatrica 2017 84 citazioni

Dosage & Usage

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

Dosaggi di uso comune

general:: 100-200 mg/day
withcaffeine:: 200 mg L-theanine + 100 mg caffeine

Limite massimo: 900 mg/day (no adverse effects observed in studies)

Dosaggi studiati nella ricerca

Dosaggio	Durata	Effetto	N
None	4.3 weeks	Positive	--
450-900 mg L-theanine daily	10 weeks	Neutral	46
250 mg/day	8 weeks	Positive	20

Momento migliore per l'assunzione: Morning or as needed; rapid onset (30-60 minutes)

Safety & Side Effects

Effetti collaterali segnalati

⚠ Generally very well-tolerated
⚠ Mild drowsiness in sensitive individuals
⚠ Mild headache (rare)

Interazioni note

● Antihypertensive drugs (may enhance blood pressure lowering)
● Stimulant medications (counteracts some stimulant side effects)
● Sedative medications (additive calming effects)

Livello di assunzione massimo tollerabile: 900 mg/day (no adverse effects observed in studies)

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

Frequently Asked Questions

Does L-Theanine help with Sleep-Related Cognitive Impairment?

Based on 6 studies with 400 participants, there is limited but promising evidence that L-Theanine may support Sleep-Related Cognitive Impairment management. Our evidence grade is C (Some Evidence).

How much L-Theanine should I take for Sleep-Related Cognitive Impairment?

Studies have used various dosages. A commonly studied range is 100-200 mg/day. Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of L-Theanine?

Reported side effects may include Generally very well-tolerated, Mild drowsiness in sensitive individuals, Mild headache (rare). Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

How strong is the evidence for L-Theanine and Sleep-Related Cognitive Impairment?

We rate the evidence as Grade C (Some Evidence). This rating is based on 6 peer-reviewed studies with 400 total participants. The overall direction of effect is positive.

Related Evidence

Altri ingredienti per Sleep-Related Cognitive Impairment

Melatonin C Ashwagandha C Magnesium L-Threonate C Creatine C

L-Theanine per altre condizioni

Attention & Focus Difficulties B Anxiety-Related Cognitive Impairment C

Verdetto rapido

Research suggests L-theanine supports sleep quality without sedation and may improve next-day cognitive performance through enhanced sleep architecture.

Evidence Strength52%

Moderate confidence

Analisi degli studi

RCT (1)Meta (0)Other (5)

Confronta le alternative

Scoprite come si confrontano altri ingredienti per questa condizione.

Visualizza tutti gli ingredienti per Sleep-Related Cognitive Impairment

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.