| AD | Alzheimer’s disease |
| ASD | Autism spectrum disorder |
| Aβ | Amyloid beta |
| BDNF | Brain-derived neutrophic factor |
| CNS | Central nervous system |
| ENS | Enteric nervous system |
| GLP-1 | Glucagon-like peptide |
| LPS | Lipopolysaccharide |
| MDD | Major depressive disorder |
| MS | Multiple sclerosis |
| NFTs | Neurofibrillary tangles |
| NLRP3 | NLR family pyrin domain containing 3 |
| PD | Parkinson’s disease |
| SCFA | Short-chain fatty acid |
| TLR-4 | Toll-like receptor-4 |