L-Theanine pour Sleep-Related Cognitive Impairment

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

𝕏 LinkedIn

<\/script>\n

`; }, get iframeSnippet() { const domain = 'braincited.com'; const params = 'ingredient\u003Dl\u002Dtheanine\u0026condition\u003Dsleep\u002Dcognitive'; return ``; }, get activeSnippet() { return this.method === 'script' ? this.scriptSnippet : this.iframeSnippet; }, copySnippet() { navigator.clipboard.writeText(this.activeSnippet).then(() => { this.copied = true; setTimeout(() => { this.copied = false; }, 2000); }); } }" @keydown.escape.window="open = false" @click.outside="open = false">

Embed This Widget

Style

Widget powered by . Free, no account required.

En conclusion

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 Effet: None p = 0.001

Population: 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 Effet: 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 Effet: None pp0.007

Population: Patients with major depressive disorder

Key Statistics

Études

400

Participants

↑

Positive

Note

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 citations

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

Journal of psychiatric … 2019 46 citations

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

Acta neuropsychiatrica 2017 84 citations

Dosage & Usage

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

Posologies couramment utilisées

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

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

Posologies étudiées dans la recherche

Posologie	Durée	Effet	N
None	4.3 weeks	Positive	--
450-900 mg L-theanine daily	10 weeks	Neutral	46
250 mg/day	8 weeks	Positive	20

Moment optimal de prise : Morning or as needed; rapid onset (30-60 minutes)

Safety & Side Effects

Effets indésirables signalés

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

Interactions connues

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

Apport maximal tolérable : 900 mg/day (no adverse effects observed in studies)

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 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

Autres ingrédients pour Sleep-Related Cognitive Impairment

Melatonin C Ashwagandha C Magnesium L-Threonate C Creatine C

L-Theanine pour d'autres pathologies

Attention & Focus Difficulties B Anxiety-Related Cognitive Impairment C

Verdict rapide

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

Evidence Strength52%

Moderate confidence

Synthèse des études

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

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 Sleep-Related Cognitive Impairment

En savoir plus

Avertissement FDA: Ces déclarations n'ont pas été évaluées par la Food and Drug Administration. Les produits et informations sur ce site ne sont pas destinés à diagnostiquer, traiter, guérir ou prévenir quelque maladie que ce soit. Les notes de preuve présentées sont basées sur notre analyse de la recherche publiée et évaluée par des pairs et ne constituent pas un avis médical. Consultez toujours votre professionnel de santé avant de commencer tout régime de compléments alimentaires.