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Chemicals Unless otherwise indicated, the chemicals, culture medium, and supplements used in this study were purchased from Sigma-Aldrich (Shanghai, China) and Thermo Fisher (Beijing, China)

The results showed that there was a greater increase in alpha activity across time in the L-theanine condition relative to placebo

[DOI] [PubMed] [Google Scholar] [102].Das P, Biswas S, Mukherjee S, Bandyopadhyay SK

Furthemore, an increased serotonin metabolism was demonstrated by diminished hypothalamic serotonin levels, lowered 5-hydroxytryptamine (5-HT)/tryptophan ratios and elevated 5-hydroxyindoleacetic acid/5-HT ratios, indicating dysregulated serotonergic system (Jia et al., 2024)