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L-Theanine 관련 Attention & Focus Difficulties

B

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.

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B

결론

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 vs: Placebo or methylphenidate Outcome: ADHD symptom severity (inattention, hyperactivity) 효과: None None

대상 집단: 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 vs: None Outcome: Anxiety symptoms 효과: None None

대상 집단: Schizophrenia patients

Systematic Review
Association between sleep pattern and pharmacological treatment in children with attention deficit disorder with hyperactivity: …
Dose: None vs: None Outcome: sleep quality 효과: None None

대상 집단: 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 vs: placebo Outcome: Brain response to stress and quality of life 효과: None p = 0.001

대상 집단: Chronically stressed but healthy subjects

Systematic Review 884 weeks
The Cognitive-Enhancing Outcomes of Caffeine and L-theanine: A Systematic Review.
Dose: 9.4% vs: None Outcome: None 효과: None None

대상 집단: 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 vs: Placebo Outcome: None 효과: None p = 0.040

대상 집단: Children with ADHD

Key Statistics

20

연구

1500

참여자

Positive

B

등급

Referenced Papers

Dosage & Usage

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

일반적으로 사용되는 용량

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

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

연구에서 사용된 용량

용량 기간 효과 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

권장 복용 시간: Morning or as needed; rapid onset (30-60 minutes)

Safety & Side Effects

보고된 부작용

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

알려진 상호작용

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

일일 최대 섭취 허용량: 900 mg/day (no adverse effects observed in studies)

건강기능식품을 복용하기 전에 반드시 의료 전문가와 상담하십시오.

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

FDA 면책 조항: 이 내용은 미국 식품의약국(FDA)의 평가를 받지 않았습니다. 이 웹사이트의 제품 및 정보는 질병의 진단, 치료, 완치 또는 예방을 목적으로 하지 않습니다. 제시된 근거 등급은 발표된 동료 심사 연구에 대한 우리의 분석에 기반하며, 의학적 조언을 구성하지 않습니다. 건강기능식품 복용을 시작하기 전에 반드시 의료 전문가와 상담하십시오.