| ANOVA | Analysis of variance |
| CAP | Capsaicin |
| CGRP | Calcitonin gene-related peptide |
| GC-MS | Gas chromatograph-mass spectrometry |
| GI | Gastrointestinal |
| H&E | Hematoxylin and eosin |
| LDA | Linear discriminant analysis |
| LEfSe | Linear discriminant analysis effect size |
| OTU | Operational taxonomic unit |
| PCoA | Principal coordinates analysis |
| SCFAs | Short-chain fatty acids |
| SEM | Standard error of the mean |
| SP | Substance P |