L-Theanine And Caffeine Improve Target-specific Attention To Visual Stimuli By Decreasing Mind Wandering: A Human Functional Magnetic Resonance Imaging Study
Notes for this study:
||During reaction time test. Number of errors. Placebo: 0.78 (SE = 0.02, t = 3.33, P = .001) TheanineL 0.78 (SE = 0.19, t = 0.00, P = 1.000). Caffeine: 0.17 ( (SE = 0.19, t = -0.89, P =.380) Combination: 0.19 ( SE = 0.19, t = -1.01, P =.307)
|Number of Subjects
In this randomized, controlled crossover trial, 9 healthy adult men took 160 mg of caffeine, 200 mg of l-theanine, the combination, or placebo on separate occasions, and an fMRI scan was performed 60 minutes afterward while participants performed a visual reaction time task.
Funding issues for this study:
Reaction time was improved in the theanine, caffeine, and combination groups, with theanine being more effective than caffeine and the combination is largely comparable to caffeine alone.
"The work was supported by the Neuroimaging Seed Grant of the College of Human Sciences,
Texas Tech University, Lubbock, Texas, USA. Authors do not have any potential conflicts of
interest to declare directly related to the production of this manuscript. Dr. Binks wishes to report
that he received educational funding for from The Coca Cola Company (2015) and research
funding from Nestlé Health Science Inc. (2016). He also has an ongoing non-financial
relationship with International Food Information Council (Scientific Advisory Board Volunteer). "