L-Theanine के लिए Attention & Focus Difficulties
B संबंधित साक्ष्य कम से कम एक यादृच्छिक परीक्षण इसका समर्थन करता है, जिसके परिणाम अधिकतर सुसंगत हैं।The L-theanine + caffeine combination is one of the most replicated nootropic pairings in cognitive research, consistently showing improvements in attention, task switching, and alertness without jitteriness.
<\/script>\n`;
},
get iframeSnippet() {
const domain = 'braincited.com';
const params = 'ingredient\u003Dl\u002Dtheanine\u0026condition\u003Dattention\u002Dfocus';
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">
B
निष्कर्ष
The L-theanine + caffeine combination is one of the most replicated nootropic pairings in cognitive research, consistently showing improvements in attention, task switching, and alertness without jitteriness.
Key Study Findings
Systematic Review
Efficiency of Different Supplements in Alleviating Symptoms of ADHD with or Without the Use of …
Dose: None
बनाम: Placebo or methylphenidate
Outcome: ADHD symptom severity (inattention, hyperactivity)
प्रभाव: None
None
जनसंख्या: ADHD patients (systematic review of supplements)
Systematic Review
The effects of L-theanine supplementation on the outcomes of patients with mental disorders: a systematic …
Dose: None
बनाम: None
Outcome: Anxiety symptoms
प्रभाव: None
None
जनसंख्या: Schizophrenia patients
Systematic Review
Association between sleep pattern and pharmacological treatment in children with attention deficit disorder with hyperactivity: …
Dose: None
बनाम: None
Outcome: sleep quality
प्रभाव: None
None
जनसंख्या: Children
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
बनाम: placebo
Outcome: Brain response to stress and quality of life
प्रभाव: None
p = 0.001
जनसंख्या: Chronically stressed but healthy subjects
Systematic Review
884 weeks
The Cognitive-Enhancing Outcomes of Caffeine and L-theanine: A Systematic Review.
Dose: 9.4%
बनाम: None
Outcome: None
प्रभाव: None
None
जनसंख्या: None
Randomized Controlled Trial
Effects of L-theanine-caffeine combination on sustained attention and inhibitory control among children with ADHD: a …
Dose: 2.5 mg/kg
बनाम: Placebo
Outcome: None
प्रभाव: None
p = 0.040
जनसंख्या: Children with ADHD
Key Statistics
20
अध्ययन
1500
प्रतिभागी
↑
Positive
B
ग्रेड
Referenced Papers
Efficiency of Different Supplements in Alleviating Symptoms of ADHD with or Without the Use of Stimulants: A Systematic Review.
Systematic Review
Nutrients
2025
1 उद्धरण
The effects of L-theanine supplementation on the outcomes of patients with mental disorders: a systematic review.
Systematic Review
BMC psychiatry
2024
12 उद्धरण
Association between sleep pattern and pharmacological treatment in children with attention deficit disorder with hyperactivity: a systematic review.
Systematic Review
Revista paulista de …
2023
3 उद्धरण
Frontiers in nutrition
2023
3 उद्धरण
Cureus
2021
20 उद्धरण
Scientific reports
2020
34 उद्धरण
Journal of psychiatric …
2019
46 उद्धरण
Acta neuropsychiatrica
2017
84 उद्धरण
Alternative medicine review …
2011
82 उद्धरण
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
सामान्य रूप से उपयोग की जाने वाली खुराकें
- general:
- 100-200 mg/day
- withcaffeine:
- 200 mg L-theanine + 100 mg caffeine
अधिकतम सीमा: 900 mg/day (no adverse effects observed in studies)
अनुसंधान में अध्ययन की गई खुराकें
| खुराक | अवधि | प्रभाव | N |
|---|---|---|---|
| None | -- | Mixed | -- |
| None | -- | Positive | -- |
| None | -- | Mixed | -- |
| None | 4.3 weeks | Positive | -- |
| 9.4% | 884 weeks | Positive | -- |
| 2.5 mg/kg | -- | Negative | -- |
| 450-900 mg L-theanine daily | 10 weeks | Neutral | 46 |
| 250 mg/day | 8 weeks | Positive | 20 |
सेवन का सर्वोत्तम समय: Morning or as needed; rapid onset (30-60 minutes)
Safety & Side Effects
रिपोर्ट किए गए दुष्प्रभाव
- ⚠ Generally very well-tolerated
- ⚠ Mild drowsiness in sensitive individuals
- ⚠ Mild headache (rare)
ज्ञात अंतःक्रियाएँ
- ● Antihypertensive drugs (may enhance blood pressure lowering)
- ● Stimulant medications (counteracts some stimulant side effects)
- ● Sedative medications (additive calming effects)
सहनीय अधिकतम सेवन: 900 mg/day (no adverse effects observed in studies)
कोई भी सप्लीमेंट शुरू करने से पहले हमेशा अपने स्वास्थ्य सेवा प्रदाता से परामर्श करें।
Frequently Asked Questions
Does L-Theanine help with Attention & Focus Difficulties?
Based on 20 studies with 1,500 participants, there is moderate evidence from clinical studies that L-Theanine may support Attention & Focus Difficulties management. Our evidence grade is B (Good Evidence).
How much L-Theanine should I take for Attention & Focus Difficulties?
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 Attention & Focus Difficulties?
We rate the evidence as Grade B (Good Evidence). This rating is based on 20 peer-reviewed studies with 1,500 total participants. The overall direction of effect is positive.
Related Evidence
इसके लिए अन्य सामग्री Attention & Focus Difficulties
L-Theanine अन्य स्वास्थ्य स्थितियों के लिए
References
- [1] Shatha Al Shahab et al.. Nutrients. 2025. Efficiency of Different Supplements in Alleviating Symptoms of ADHD with or Without the Use of Stimulants: A Systematic Review. doi:10.3390/nu17091482 PubMed
- [2] Reza Moshfeghinia et al.. BMC Psychiatry. 2024. The effects of L-theanine supplementation on the outcomes of patients with mental disorders: a systematic review. doi:10.1186/s12888-024-06285-y PubMed
- [3] Nathalia Sena Rocha et al.. Rev Paul Pediatr. 2023. Association between sleep pattern and pharmacological treatment in children with attention deficit disorder with hyperactivity: a systematic review. doi:10.1590/1984-0462/2023/41/2022065 PubMed
- [4] Gisèle Pickering et al.. Front Nutr. 2023. Assessing brain function in stressed healthy individuals following the use of a combination of green tea, Rhodiola, magnesium, and B … doi:10.3389/fnut.2023.1211321 PubMed
- [5] Anas Anas Sohail et al.. Cureus. 2021. The Cognitive-Enhancing Outcomes of Caffeine and L-theanine: A Systematic Review. doi:10.7759/cureus.20828 PubMed
- [6] Chanaka N Kahathuduwa et al.. Sci Rep. 2020. Effects of L-theanine-caffeine combination on sustained attention and inhibitory control among children with ADHD: a proof-of-concept neuroimaging RCT. doi:10.1038/s41598-020-70037-7 PubMed
- [7] Jerome Sarris et al.. J Psychiatr Res. 2019. L-theanine in the adjunctive treatment of generalized anxiety disorder: A double-blind, randomised, placebo-controlled trial. doi:10.1016/j.jpsychires.2018.12.014 PubMed
- [8] Shinsuke Hidese et al.. Acta Neuropsychiatr. 2017. Effects of chronic l-theanine administration in patients with major depressive disorder: an open-label study. doi:10.1017/neu.2016.33 PubMed
- [9] Michael R Lyon et al.. Altern Med Rev. 2011. The effects of L-theanine (Suntheanine®) on objective sleep quality in boys with attention deficit hyperactivity disorder (ADHD): a randomized, double-blind, … PubMed
FDA अस्वीकरण: इन कथनों का Food and Drug Administration द्वारा मूल्यांकन नहीं किया गया है। इस वेबसाइट पर उत्पादों और जानकारी का उद्देश्य किसी बीमारी का निदान, उपचार, इलाज या रोकथाम नहीं है। प्रस्तुत साक्ष्य ग्रेड प्रकाशित पीयर-रिव्यूड अनुसंधान के हमारे विश्लेषण पर आधारित हैं और चिकित्सा सलाह नहीं हैं। कोई भी सप्लीमेंट शुरू करने से पहले हमेशा अपने स्वास्थ्य सेवा प्रदाता से परामर्श करें।