| HMO | Human milk oligosaccharide |
| HBM | Human breast milk |
| 2′-FL | 2′-Fucosyllactose |
| DFL | Difucosyllactose |
| LNFP I | Lactose-N-fucosidase |
| 3′-SL | 3′-Sialyllactose |
| LNT | Lacto-N-tetraose |
| LNnT | Lacto-N-neo-tetraose |
| FA | Food allergy |
| AAS | Allergic asthma |
| AD | Atopic dermatitis |
| CMPA | Cow’s milk protein allergy |
| CECAQ | Comprehensive Early Childhood Allergy Questionnaire |
| OTU | Operational taxonomic unit |
| SCFA | Short-chain fatty acid |
| GPR | G-protein-coupled receptor |