L-Theanine reduces psychological and physiological stress responses. – Cost Effective Supplements

L-Theanine reduces psychological and physiological stress responses.

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Link to full study

http://www.ncbi.nlm.nih.gov/pubmed/16930802

Conclusion of this study

Moreover, analyses of heart rate variability indicated that the reductions in HR and s-IgA were likely attributable to an attenuation of sympathetic nervous activation. Thus, it was suggested that the oral intake of L-Theanine could cause anti-stress effects via the inhibition of cortical neuron excitation.