Anti-Stress, Behavioural and Magnetoencephalography Effects of an L-Theanine-Based Nutrient Drink: A Randomised, Double-Blind, Placebo-Controlled, Crossover Trial
White DJ, de Klerk S, Woods W, Gondalia S, Noonan C, Scholey AB
Published in Nutrients
Key Findings
An L-theanine-based drink reduced subjective stress response to a cognitive stressor and reduced salivary cortisol at 3 h; resting alpha oscillatory activity was modulated on MEG.
Conclusions
L-theanine attenuated acute stress responses, consistent with GABAergic/alpha-wave mechanisms.
Limitations
Small sample, acute dosing, multi-ingredient drink limits attribution to theanine alone.
Supplements Studied
L-theanine (gamma-glutamylethylamide) is an amino acid found primarily in the green tea plant.
Outcomes Measured
This study explored the effects of an L-theanine-based nutrient drink on mood responses to a cognitive stressor.
Study Details
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