| BF | Breastfeeding group (Breastmilk + Complementary Foods) |
| NBF | Non-Breastfeeding group (Breastmilk Weaning Completed) |
| 6M | 6 months group |
| 12M | 12 months group |
| 18M | 18 months group |
| 24M | 24 months group |
| MAL-ED | Etiology, Risk Factors and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development |
| ENA | European Nucleotide Archive |
| ClinEpiDB | Clinical Epidemiology Resources |
| rRNA | ribosomal RNA |
| ASVs | Amplicon Sequence Variants |
| OTUs | Operational Taxonomic Units |
| FDR | False Discovery Rate |
| PCoA | Principal Coordinates Analysis |
| PERMANOVA | Principal Coordinates Analysis |
| PERMDISP | Multivariate Dispersions |
| HMOs | Human Milk Oligosaccharides |
| SCFAs | Short-Chain Fatty Acids |
| WHO | World Health Organization |