BDNF	Brain-derived neurotrophic factor
EGCG	Epigallocatechin gallate
GTE	Green tea extract
L-theanine	An amino acid found in tea
DSM-5	Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition
CDC	Centers for Disease Control
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta Analyses
PICOS	Population, Intervention, Comparison, Outcome, Study Design
STAI	State-Trait Anxiety Inventory
POMS	Profile of Mood States
HDRS	Hamilton Depression Rating Scale
VAS	Visual Analog Scale
PANSS	Positive and Negative Syndrome Scale
HAM-A	Hamilton Anxiety Rating Scale
MADRS	Montgomery-Asberg Depression Rating