The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review
Williams JL, Everett JM, D'Cunha NM, Sergi D, Georgousopoulou EN, Keegan RJ
Published in Plant Foods for Human Nutrition, Vol. 75 (1), pp. 12-23
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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This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.