Animal studies further support these findings, showing that Bifidobacterium supplementation can improve memory and behavior in ADHD‐like models, with associated increases in neurotransmitters such as acetylcholine, dopamine, norepinephrine, and brain‐derived neurotrophic factor (BDNF), alongside reductions in glutamate levels [8]. The gene discussed is BDNF; the disease is attention deficit-hyperactivity disorder.