| BMI | Body Mass Index |
| BSFS | Bristol Stool Form Scale |
| CH4 | Methane |
| CKD | Chronic Kidney Disease |
| eGFR | Estimated glomerular filtration rate |
| FFQ | Food Frequency Questionnaire |
| GI | Gastrointestinal |
| H2 | Hydrogen |
| IBS | Irritable bowel syndrome |
| KTR | Kidney Transplant Recipients |
| MMF | Mycophenolate mofetil |
| PPI | Proton-pump inhibitors |
| RS | Resistant starch |
| SCFA | Short-chain Fatty Acids |
| SIBO | Small Intestinal Bacterial Overgrowth |