PubHawk
January 2007 PMID 16930802

L-Theanine reduces psychological and physiological stress responses.

Kenta Kimura, Makoto Ozeki, Lekh Raj Juneja, Hideki Ohira

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Mentions

87
Peak: 2 in Oct 2023
across 5 sources since Jul 2019

Extended reach

61,853
potential audience

Total likes

43

Video views

687

Mentions per month

Jul 2019 – Aug 2025

Where it's discussed

  • News57 articles
  • Facebook12 posts
  • X / Twitter10 posts
  • Blogs5 articles
  • YouTube3 videos

AI synopsis

What people are saying

Discussions reflect general agreement with the article's claims, with users mentioning effects like improved sleep quality through increased alpha waves and better HRV readings, often linking their personal experiences with L-Theanine. The tone varies from supportive to mildly curious, showing moderate engagement and acknowledgment of potential benefits.

AgreementStrong agreement

Most discussions support the evidence that L-Theanine has stress-reducing effects, aligning with the publication's findings.

InterestModerate interest

Several posts show moderate curiosity, especially when mentioning potential benefits like improved sleep or HRV, indicating interest but not overwhelming engagement.

EngagementModerate engagement

Posts mention specific effects such as brain wave modulation and physiological responses, reflecting some engagement but not deep analysis.

ImpactModerate impact

The conversations hint at recognizing the potential of L-Theanine to influence stress and sleep, suggesting a moderate perceived impact.

Abstract in brief

  • L-Theanine, an amino acid from green tea, may reduce stress responses by blocking glutamate receptors in the brain.
  • A laboratory study using a mental arithmetic stress test found that L-Theanine lowered heart rate and salivary immunoglobulin A levels compared to a placebo, indicating reduced stress.
  • The results suggest that L-Theanine's anti-stress effects may work by decreasing sympathetic nervous system activity and cortical neuron excitation.
Read the full abstract

Top posts

Most liked on X and Bluesky
下心が止まらない論文おぢさん
@takuhira_tweet · X

手っ取り早くストレスを減らす食品「緑茶」 この研究では、L-テアニンの経口摂取は、皮質ニューロンの興奮の阻害を介して抗ストレス効果を引き起こす可能性があることが示唆しているよ

Jan 17, 2025 · 11 likes · 316 followers View post →
Wendi A. Irlbeck MS, RDN, LD, CISSN
@Wendi_Irlbeck · X

1.Kimura, K., Ozeki, M., Juneja, L. R., & Ohira, H. (2007). L-Theanine reduces psychological and physiological stress responses. Biological psychology, 74(1), 39–45. https://t.co/FXWMIOVH9g 2.Yoto, A., Motoki, M., Murao, S. et al. Effects of L-theanine or caffeine intake on

Mar 7, 2024 · 1 like · 54,127 followers View post →
Karl Etzel
@KarlEtzel · X

Realized this might also be the driver in my improved #HRV numbers, popping a L-Theanine supp with my #coffee. "L-Theanine reduces psychological and physiological stress responses." https://t.co/p89jOhkncD https://t.co/qJGJMgHDtb

Jul 15, 2019 · 1 like · 643 followers View post →
Daniel Yoo
@DanielYoo131264 · X

L-Theanine reduces psychological and physiological stress responses - PubMed https://t.co/Yspm3E0TtT

May 29, 2024 · 1 like · 89 followers View post →
Knocked Sleep Support
@takeknocked · X

Theanine helps modify brain waves by increasing alpha-wave production, which improves sleep quality. https://t.co/0wA0JIkgCJ

Jan 18, 2023 · 1 like · 39 followers View post →
mingliangchen
@mingliangchen1 · X

L-Theanine reduces psychological and physiological stress responses.

Apr 13, 2021 · 1 like View post →

All mentions

Team Accelerated
@ShopAccelerated · X

https://t.co/hIT2kEcHZl

Aug 30, 2025 · 134 followers View post →
Science of Fitness
@NoMoreFitLies · X

@Outdoctrination

Jul 18, 2025 · 1,236 followers View post →
下心が止まらない論文おぢさん
@takuhira_tweet · X

手っ取り早くストレスを減らす食品「緑茶」 この研究では、L-テアニンの経口摂取は、皮質ニューロンの興奮の阻害を介して抗ストレス効果を引き起こす可能性があることが示唆しているよ

Jan 17, 2025 · 11 likes · 316 followers View post →
Daniel Yoo
@DanielYoo131264 · X

L-Theanine reduces psychological and physiological stress responses - PubMed https://t.co/Yspm3E0TtT

May 29, 2024 · 1 like · 89 followers View post →
Wendi A. Irlbeck MS, RDN, LD, CISSN
@Wendi_Irlbeck · X

1.Kimura, K., Ozeki, M., Juneja, L. R., & Ohira, H. (2007). L-Theanine reduces psychological and physiological stress responses. Biological psychology, 74(1), 39–45. https://t.co/FXWMIOVH9g 2.Yoto, A., Motoki, M., Murao, S. et al. Effects of L-theanine or caffeine intake on

Mar 7, 2024 · 1 like · 54,127 followers View post →
三
@pnd5t · X

RT @yasu0804: https://t.co/pWWiQEcBst

Oct 21, 2023 · 1 share View post →
ぽん
@yasu0804 · X

https://t.co/pWWiQEcBst

Oct 17, 2023 · 1 share · 4,579 followers View post →
Knocked Sleep Support
@takeknocked · X

Theanine helps modify brain waves by increasing alpha-wave production, which improves sleep quality. https://t.co/0wA0JIkgCJ

Jan 18, 2023 · 1 like · 39 followers View post →
mingliangchen
@mingliangchen1 · X

L-Theanine reduces psychological and physiological stress responses.

Apr 13, 2021 · 1 like View post →
Karl Etzel
@KarlEtzel · X

Realized this might also be the driver in my improved #HRV numbers, popping a L-Theanine supp with my #coffee. "L-Theanine reduces psychological and physiological stress responses." https://t.co/p89jOhkncD https://t.co/qJGJMgHDtb

Jul 15, 2019 · 1 like · 643 followers View post →