L-Theanine için Uykusuzluk

Q: Does L-Theanine help with Uykusuzluk?

Based on 16 studies with 916 participants, there is strong evidence from multiple clinical trials that L-Theanine may support Uykusuzluk management. Our evidence grade is A (Strong Evidence).

Q: How much L-Theanine should I take for Uykusuzluk?

Studies have used various dosages. A commonly studied range is 200-400 mg, 30-60 min before bed. Always consult your healthcare provider before starting any supplement regimen.

Q: Are there side effects of L-Theanine?

Reported side effects may include Headache, Dizziness, GI discomfort. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

Q: How strong is the evidence for L-Theanine and Uykusuzluk?

We rate the evidence as Grade A (Strong Evidence). This rating is based on 16 peer-reviewed studies with 916 total participants. The overall direction of effect is positive.

16 çalışmaya (4 meta-analyses, 4 RCTs), toplam 916 katılımcıyla dayanmaktadır. 11/16 çalışma olumlu etkiler göstermektedir.

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Sonuç

L-theanine is well-supported by research as a supplement that may help improve sleep quality, especially for people who struggle with a busy mind at bedtime.

11 out of 16 studies show positive effects, including 4 RCTs and 4 meta-analyses
A 2026 systematic review confirmed L-theanine's benefits for sleep
Shown to be comparable to melatonin for sleep improvement in a 2024 cancer patient trial
Works by enhancing GABA activity and reducing mental arousal without next-day grogginess

Key Study Findings

systematic review n=550 Double-blind

Examining the effect of L-theanine on sleep: a systematic review of dietary supplementation trials.

Dose: L-theanine 50-900 mg/day; effective range 200-450 mg/day vs: Placebo Etki: Beneficial effects on sleep latency, maintenance, efficiency; improved perceived sleep satisfaction None

RCT n=120 2 weeks Double-blind

Comparison Between Efficacy of Oral Melatonin and Oral L-theanine in Improving Sleep in Cancer Patients …

Dose: Melatonin 3 mg or L-theanine 200 mg taken 2h before bedtime for 14 days vs: Placebo Etki: None p<0.005

narrative review

Herbal and Natural Supplements for Improving Sleep: A Literature Review.

Dose: varies by supplement vs: Placebo Etki: None None

RCT n=40 8 weeks Double-blind

Dietary supplementation with Lactium and L-theanine alleviates sleep disturbance in adults: a double-blind, randomized, placebo-controlled …

Dose: None vs: Placebo Etki: None None

animal study (preclinical)

Protective effects of a probiotic-fermented germinated grain complex on neurotransmitters and sleep quality in sleep-deprived …

Dose: 7 L fermentation product; GABA 12.555 µmol/L, L-theanine 0.471 mg/mL vs: Placebo Etki: None p < 0.0001 (sleep duration KEY

systematic_review

The Role of Supplements and Over-the-Counter Products to Improve Sleep in Children: A Systematic Review.

Dose: iron, 5-hydroxytryptophan (5-HTP), theanine, antihistamines (OTC supplements) vs: Placebo Etki: None None

Key Statistics

Çalışmalar

916

Katılımcılar

↑

Positive

Derece

Referenced Papers

Examining the effect of L-theanine on sleep: a systematic review of dietary supplementation trials. Systematic Review

Nutritional neuroscience 2026

Herbal and Natural Supplements for Improving Sleep: A Literature Review. Other

Psychiatry investigation 2024 24 atıf

Protective effects of a probiotic-fermented germinated grain complex on neurotransmitters and sleep quality in sleep-deprived mice. Other

Frontiers in microbiology 2024 13 atıf

Dietary supplementation with Lactium and L-theanine alleviates sleep disturbance in adults: a double-blind, randomized, placebo-controlled clinical study. Other

Frontiers in nutrition 2024 5 atıf

Comparison Between Efficacy of Oral Melatonin and Oral L-theanine in Improving Sleep in Cancer Patients Suffering From Insomnia: A Randomised … Other

Indian journal of … 2024 3 atıf

The Role of Supplements and Over-the-Counter Products to Improve Sleep in Children: A Systematic Review. Systematic Review

International journal of … 2023 14 atıf

Analysis of the Effects of Known Sleep-Support Supplements in Relation to Life Habits, Sleep Conditions, and Sleep Problems. RCT

Nutrients 2023 6 atıf

Complementary and Integrative Approaches to Sleep Disorders in Children. Review

Child and adolescent … 2023 5 atıf

Medicinal herbs for the treatment of anxiety: A systematic review and network meta-analysis. Meta-Analysis

Pharmacological research 2022 51 atıf

A comprehensive review on bioavailability, safety and antidepressant potential of natural bioactive components from tea. Review

Food research international … 2022 46 atıf

GABA and l-theanine mixture decreases sleep latency and improves NREM sleep. Other

Pharmaceutical biology 2019 134 atıf

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

Journal of psychiatric … 2019 46 atıf

Safety, Tolerability and Efficacy of Drugs for Treating Behavioural Insomnia in Children with Attention-Deficit/Hyperactivity Disorder: A Systematic Review with Methodological … Systematic Review

Paediatric drugs 2017 26 atıf

To sleep or not to sleep: a systematic review of the literature of pharmacological treatments of insomnia in children and … Systematic Review

Journal of child … 2013 56 atıf

L-theanine partially counteracts caffeine-induced sleep disturbances in rats. Other

Pharmacology, biochemistry, and … 2012 51 atıf

Formulations of dietary supplements and herbal extracts for relaxation and anxiolytic action: Relarian. Review

Medical science monitor … 2009 85 atıf

Dosage & Usage

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

Yaygın Kullanılan Dozajlar

sleep:: 200-400 mg, 30-60 min before bed

Üst sınır: Not established; generally safe up to 900 mg/day

Araştırmalarda İncelenen Dozajlar

Dozaj	Süre	Etki	N
L-theanine 50-900 mg/day; effective range 200-450 mg/day	--	Positive	550
Melatonin 3 mg or L-theanine 200 mg taken 2h before bedtime for 14 days	2 weeks	Positive	120
varies by supplement	--	Positive	--
None	8 weeks	Positive	40
7 L fermentation product; GABA 12.555 µmol/L, L-theanine 0.471 mg/mL	--	Positive	--
iron, 5-hydroxytryptophan (5-HTP), theanine, antihistamines (OTC supplements)	--	Mixed	--
l-theanine 200 mg/day, GABA 111.1 mg/day, AVLE 50 mg/day, l-serine 300 mg/day	--	Positive	160
None	--	Positive	--

En iyi alım zamanı: 30-60 minutes before bed

Safety & Side Effects

Bildirilen Yan Etkiler

⚠ Headache
⚠ Dizziness
⚠ GI discomfort

Bilinen Etkileşimler

● Blood pressure medications — L-theanine may lower blood pressure
● Stimulants (caffeine) — may partially counteract stimulant effects
● Sedatives — potential additive calming effects

Tolere edilebilir üst alım: Not established; generally safe up to 900 mg/day

Herhangi bir takviye kullanmaya başlamadan önce mutlaka sağlık uzmanınıza danışın.Herhangi bir takviye başlatmadan önce her zaman sağlık uzmanınıza danışın.

Frequently Asked Questions

Does L-Theanine help with Uykusuzluk?

Based on 16 studies with 916 participants, there is strong evidence from multiple clinical trials that L-Theanine may support Uykusuzluk management. Our evidence grade is A (Strong Evidence).

How much L-Theanine should I take for Uykusuzluk?

Studies have used various dosages. A commonly studied range is 200-400 mg, 30-60 min before bed. Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of L-Theanine?

Reported side effects may include Headache, Dizziness, GI discomfort. 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 Uykusuzluk?

We rate the evidence as Grade A (Strong Evidence). This rating is based on 16 peer-reviewed studies with 916 total participants. The overall direction of effect is positive.

Related Evidence

Şu durum için diğer içerikler: Uykusuzluk

Melatonin A Valerian Kökü A CBD A Omega-3 Yağ Asitleri A Tryptophan A D Vitamini A

L-Theanine diğer sağlık durumları için

Uykuya Dalma Güçlüğü A Anksiyeteye Bağlı Uyku Sorunları B

Hızlı Değerlendirme

16 çalışmaya (4 meta-analyses, 4 RCTs), toplam 916 katılımcıyla dayanmaktadır. 11/16 çalışma olumlu etkiler göstermektedir.

Evidence Strength92%

High confidence

Çalışma Dağılımı

RCT (2)Meta (1)Other (13)

Alternatifleri Karşılaştır

Bu durum için diğer bileşenlerin nasıl karşılaştırıldığını görün.Diğer içeriklerin bu sağlık durumu için nasıl karşılaştırıldığını görün.

Şu durum için tüm içerikleri görüntüle: Uykusuzluk

Daha Fazla Bilgi

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