L-theanine and acute stress and anxiety responses: a systematic review of randomized controlled trials
Williams JL, Everett JM, D'Cunha NM, Sergi D, Georgousopoulou EN, Keegan RJ
Published in Plant Foods for Human Nutrition
Methodology
Systematic review of randomized trials of L-theanine on subjective stress, anxiety and physiological arousal markers.
Key Findings
L-theanine reduced acute stress and anxiety in stress-inducing settings but had little effect on chronic clinical anxiety.
Conclusions
L-theanine blunts acute arousal rather than preventing clinical panic.
Limitations
Small acute-dosing studies; heterogeneous stress models.
Supplements Studied
L-theanine reduced acute stress and anxiety in stress-inducing settings
Outcomes Measured
L-theanine reduced acute stress and anxiety in stress-inducing settings but had little effect on chronic clinical anxiety
L-theanine reduced acute stress and anxiety in stress-inducing settings
L-theanine showed little effect on chronic anxiety despite acute stress-response benefits
Related Health Concerns
Study Details
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