PubHawk
December 2010 PMID 21040626

The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness.

T Giesbrecht, J A Rycroft, M J Rowson, E A De Bruin

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Mentions

88
Peak: 2 in Mar 2021
across 7 sources since May 2019

Extended reach

158,819
potential audience

Total likes

2,281

Video views

69,945

Mentions per month

May 2019 – Oct 2025

Where it's discussed

  • News56 articles
  • X / Twitter10 posts
  • Facebook8 posts
  • YouTube5 videos
  • Reddit4 posts
  • Blogs4 articles
  • Bluesky1 posts

AI synopsis

What people are saying

The discussions show strong interest and support for the research, with examples like mentions of improved focus and alertness, and references to scientific studies. The tone suggests curiosity and perceived benefits, reflected in phrases such as 'it works too!' and questions like 'Anybody try this?', which foster a conversational and exploratory atmosphere.

AgreementModerate agreement

The majority of posts express support or curiosity about the benefits of combining L-theanine and caffeine, indicating general agreement with the study's findings.

InterestHigh interest

Many discussions ask if others have tried this combination and reference related studies, showing high interest in the topic.

EngagementModerate engagement

Posts include personal opinions, references to scientific sources, and questions, demonstrating moderate engagement.

ImpactModerate impact

While some posts mention the potential positive effects, the overall impact seems to be moderate, as the discussion remains somewhat introductory without deep exploration of implications.

Abstract in brief

  • The study found that a combination of 97 mg of L-theanine and 40 mg of caffeine enhances cognitive performance, specifically improving accuracy in task switching, and increases subjective alertness in young adults.
  • This combination also reduced feelings of tiredness without significantly affecting other cognitive functions such as reaction times or mental rotation, and did not produce notable changes in blood pressure or heart rate.
  • Overall, the results suggest that moderate doses of L-theanine and caffeine together help improve focus and alertness during demanding cognitive tasks.]
Read the full abstract

Top posts

Most liked on X and Bluesky
Colin Matson
@thecolinmatson · X

Studies for L-Theanine: 1: https://t.co/SMCz1tOhQ4 2: https://t.co/3gwBGowF1j 3: https://t.co/3sVuxJUZwB

Feb 25, 2023 · 12 likes · 7,548 followers View post →
Vitalholis
@vitalholis · X

lors de tâches exigeantes. https://t.co/i0KMYtO47P

Sep 7, 2023 · 7 likes · 19,164 followers View post →
Dr Pooja Garg
@poojagarg1111 · X

@Vespasito In a small study, it was discovered that a combination of L-theanine 97 mg and caffeine 40 mg improved a group of young adults' ability to concentrate on difficult tasks. Participants in the study reported feeling generally more alert and less fatigued. https://t.co/9735F7K8Qy

Dec 29, 2022 · 1 like · 28,018 followers View post →
robmillertime
@robmillertime · X

@shinychevy L-Theanine https://t.co/dESV1hqjhR

Mar 10, 2021 · 1 like · 9,734 followers View post →
Greg Frontiero
@SfwGreg · X

@jatarps Yup. L-theanine and Raw Cacao mitigate the negative side effects and keep the energy Here's a few studies about l-theanine https://t.co/VFcn77QFLE https://t.co/mkdNJ6UJys raw cacao is for a mood boost and better blood flow to the brain meaning you need less caffeine overall!

Dec 15, 2021 · 1 like · 2,292 followers View post →
My Tea Connection
@MyTeaConnection · X

May 29, 2024 · 1 like · 740 followers View post →

All mentions

Bomba Nootropics
@BombaNootropics · X

Caffeine gives energy. L-Theanine calms it. Together, they boost attention, reaction time & focus without the crash. Source: Nutritional Neuroscience (2010) https://t.co/eG9LGLsg5w Clean focus > fake hype. ⚡

Oct 13, 2025 · 1 like · 11 followers View post →
Nuvens de Fumo
@nuvensdefumo · X

@Nateirrites A ingestão de bebidas com cafeína ajuda, estilo monster sem açúcar e tomando L-Tianina, que ajuda a minimizar os efeitos negativos da cafeína, ajudam tb... https://t.co/UL7nn5YZLO https://t.co/XtMDGdRuDg

Sep 19, 2025 · 2,192 followers View post →
My Tea Connection
@MyTeaConnection · X

May 29, 2024 · 1 like · 740 followers View post →
Vitalholis
@vitalholis · X

lors de tâches exigeantes. https://t.co/i0KMYtO47P

Sep 7, 2023 · 7 likes · 19,164 followers View post →
#HelpYouGetGAINS
@helpYOUgetGAINS · X

The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness https://t.co/jGwgJ1qHoe

Jul 31, 2023 · 16,884 followers View post →
Mimi
@jrzygirlinfla.bsky.social · Bluesky

Anybody try this? https://pubmed.ncbi.nlm.nih.gov/21040626/

May 16, 2023 · 1 like View post →
Colin Matson
@thecolinmatson · X

Studies for L-Theanine: 1: https://t.co/SMCz1tOhQ4 2: https://t.co/3gwBGowF1j 3: https://t.co/3sVuxJUZwB

Feb 25, 2023 · 12 likes · 7,548 followers View post →
Dr Pooja Garg
@poojagarg1111 · X

@Vespasito In a small study, it was discovered that a combination of L-theanine 97 mg and caffeine 40 mg improved a group of young adults' ability to concentrate on difficult tasks. Participants in the study reported feeling generally more alert and less fatigued. https://t.co/9735F7K8Qy

Dec 29, 2022 · 1 like · 28,018 followers View post →
Greg Frontiero
@SfwGreg · X

@jatarps Yup. L-theanine and Raw Cacao mitigate the negative side effects and keep the energy Here's a few studies about l-theanine https://t.co/VFcn77QFLE https://t.co/mkdNJ6UJys raw cacao is for a mood boost and better blood flow to the brain meaning you need less caffeine overall!

Dec 15, 2021 · 1 like · 2,292 followers View post →
Greg Frontiero
@SfwGreg · X

@Myles_Younger It works too! https://t.co/VFcn77QFLE

Mar 19, 2021 · 2,292 followers View post →
robmillertime
@robmillertime · X

@shinychevy L-Theanine https://t.co/dESV1hqjhR

Mar 10, 2021 · 1 like · 9,734 followers View post →