| GI | Gastrointestinal |
| EMA | European Medicines Agency |
| EFSA | European Food Safety Authority |
| PPIs | Proton Pump Inhibitors |
| FS | Food Supplement |
| EO | Essential Oil |
| GERD | Gastroesophageal Reflux Disease |
| HMP | Herbal Medicinal Product |
| PVD | Food Supplements Register (in Latvian: Pārtikas un Veterinārais Dienests) |
| EU | European Union |
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