| GI | Gastrointestinal |
| ZD | Zinc deficiency |
| IBD | Inflammatory bowel disease |
| CD | Crohn’s disease |
| UC | Ulcerative colitis |
| PUD | Peptic ulcer disease |
| GERD | Gastroesophageal reflux disease |
| PPI | Proton pump inhibitor |
| GFD | Gluten-free diet |
| H-2 | histamine-2 |
| NSAIDs | Non-steroidal anti-inflammatory drugs |
| SDs | Zinc solid dispersions |
| RDQ | Reflux Disease Questionnaire |
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