What is Beneficial Bacteria Relative Abundance?
The paediatric gut microbiome develops rapidly from birth through early childhood, shaped by mode of delivery, feeding method, antibiotic exposure, and diet. Bifidobacterium species dominate the breastfed infant gut and support immune education, epithelial barrier maturation, and short-chain fatty acid production. Lactobacillus species contribute to pathogen exclusion and mucosal immunity. Akkermansia muciniphila maintains mucus-layer integrity, and Faecalibacterium prausnitzii — a butyrate producer — becomes more prominent as the diet diversifies. The composition at each developmental stage reflects the child's diet, environment, and immune maturation rather than a single static 'optimal' profile.