| AhR | Aryl Hydrocarbon Receptor |
| ARNT | Aryl hydrocarbon receptor nuclear translocator |
| BaP | benzo[a]pyrene |
| FICZ | 6-formylindolo[3,2-b]carbazole |
| IAA | indole-3-acetate |
| IAC | indole-3-acrylate |
| IAD | indole-3-acetamide |
| IET | indole-3-ethanol |
| ILA | indole-3-lactate |
| IND | indole |
| IPA | indole-3-propionate |
| IPY | indole-3-pyruvate |
| 3MI | skatole |
| MICT | microbial intestinal catabolites of tryptophan |
| PXR | Pregnane X Receptor |
| TA | Tryptamine |
| TCDD | 2,3,7,8-tetrachlorodibenzo-p-dioxin |