AD	Alzheimer’s disease
BDNF	Brain-derived neurotrophic factor
CDR-SB	Clinical Dementia Rating Sum of Box
CRCI	Cancer-related cognitive impairment
CSVD	Cerebral small vessel disease
FD	Fiber-rich diet
FFAs	Free Fatty Acids
FODMAP	Fermentable oligosaccharides, disaccharides, monosaccharides and polyols
GABA	Gamma-aminobutyric acid
GNHS	Guangzhou Nutrition and Health Study
GO	Gene Ontology
GWAS	Genome-wide association studies
HDL	High-density lipoprotein
HIV	Human immunodeficiency virus
IL-1β	Interleukin-1 beta
IL-4	Interleukin 4
IL-6	Interleukin 6
IL-10	Interleukin 10
LPS	Lipopolysaccharide
MCCB	MATRICS Consensus Cognitive Battery
MCI	Mild cognitive impairment
MiaGB	Microbiome in Aging Gut and Brain
MMSE	Mini-Mental State Examination
MoCA	Montreal Cognitive Assessment
OS	Oxidative stress
PD	Parkinson’s disease
PET	Positron emission tomography
RBANS	Repeatable Battery for the Assessment of Neuropsychological Status
REML	Restricted maximum likelihood
RS	Rope skipping
SCFAs	Short-chain fatty acids
Th17	T-helper 17
TNF-α	Tumor necrosis factor alpha
VFT	Verbal Fluency Test
VSRAD	Voxel-based specific regional analysis system for AD