Publications by authors named "Ibuki Sugiyama"
Article Synopsis
- The study investigated how l-theanine and l-arginine, two amino acids found in green tea, affect psychological stress in humans.
- A randomized, placebo-controlled trial with 120 young adults tested the effects of these amino acids on stress responses measured through a performance test and salivary alpha-amylase activity.
- Results showed both theanine and the combination of theanine/arginine reduced stress indicators compared to placebo, but there was no significant difference between the two supplement groups, indicating no clear enhancement of stress relief from combining them.