AD	Alzheimer’s disease
Aβ	Amyloid-beta
NFTs	Neurofibrillary tangles
MGB	Microbiota–gut–brain
GIT	Gastrointestinal tract
CNS	Central nervous system
LPS	Lipopolysaccharides
TLR	Toll-like receptor
SCFA	Short chain fatty acids
APP	Amyloid precursor protein