If you’ve ever watched your child struggle to sit still or noticed their attention wandering, you’ve probably wondered what’s happening in their developing brain. You’re not imagining things—and new research is beginning to show that the story starts earlier than many expected. A landmark study from Denmark’s COPSAC2010 birth cohort has uncovered a surprising connection between the gut bacteria present in a baby’s first week of life and how their attention skills develop by age 10.
What Researchers Discovered
Scientists at Copenhagen University Hospital followed hundreds of children from birth through age 10, analyzing their gut microbiome at just one week old and tracking their attention development over time. The findings were unexpected: children with higher levels of Bifidobacterium bacteria in their first-week gut microbiome showed a 54-59% increase in odds of developing attention challenges at age 10.
But here’s where it gets really interesting. The researchers found that this relationship was partly mediated by a metabolite called indole-3-lactic acid (ILA)—a chemical produced by gut bacteria that circulates in the blood. About 21% of the effect of early gut bacteria on later attention development appeared to work through this metabolic pathway.
New research reveals the gut bacteria present in a baby's first week may influence attention development by age 10. Here's what this means for parents.
Why This Matters for Parents
This research represents the first time scientists have connected a specific neonatal gut microbiome signature, its metabolic byproduct, and later attention development outcomes. Previous research on the gut-brain axis has been mostly cross-sectional, looking at children who already have attention differences. This study looked at the critical first week of life—before any labels, before any concerns, when the foundational architecture for future development is being laid.
The implication? The timing and pattern of early gut colonization may play a role in neurodevelopmental trajectories. This doesn’t mean gut bacteria cause attention challenges—rather, it opens up a new avenue for understanding how we might support healthy development from the very beginning.
Quote: Higher level of Bifidobacterium in the child’s one-week gut microbiome, after extensively adjusting for genetic and early-life factors, is associated with ADHD at age 10.Attribution: Michael Widdowson, Lead Researcher, Copenhagen University Hospital
Laura Lurns · Learning Success expert
What This Means for Supporting Attention Skills
Before any parent worries, let’s be clear: this research identifies a correlation, not a cause. Children with different gut bacteria patterns may face different starting points, but every child’s brain remains remarkably adaptable. The science of neuroplasticity tells us that brains change throughout childhood—and beyond—when given the right inputs and support.
What this study actually offers is hope: understanding the gut-brain connection gives us another tool in supporting healthy development. The researchers suggest that promoting appropriate temporal colonization patterns for beneficial bacteria and their metabolites in newborns could represent potential strategies for supporting neurodevelopment.
Key takeaways
- Early Gut Patterns Identified: Higher levels of Bifidobacterium at one week old were associated with increased odds of attention challenges at age 10 in the COPSAC2010 cohort.
- Metabolic Pathway Discovered: The metabolite indole-3-lactic acid mediated approximately 21% of the association between early gut bacteria and later attention development.
- New Research Frontier: This is the first study linking a specific neonatal microbiome signature, its metabolite, and later attention outcomes—replicated in two independent cohorts.
The Road Ahead
The findings were replicated in two independent cohorts, which strengthens the reliability of these observations. This is early-stage research that opens new questions: Can we optimize early gut colonization? Might metabolic markers help identify children who could benefit from additional support? These are questions researchers will explore in the coming years.
For parents, the message is clear: your child’s potential is not fixed. Whether they’re building attention skills, developing focus capabilities, or learning to regulate their energy—every child can grow and develop with the right support. The gut-brain connection is just one piece of a much larger picture of possibilities.
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Laura Lurns · Learning Success expert
At Learning Success, we believe every child is capable of building the attention and focus skills they need to thrive.Brains change—rapidly and dramatically—when given the right input. Rather than waiting for a system that labels rather than develops, parents can take an active role in supporting their child’s growth through evidence-based approaches that build skills rather than manage symptoms.
If you’re ready to discover how you can support your child’s developing attention skills with a personalized approach, the Learning Success All Access Program offers a free trial that includes a personalized Action Plan—and you keep that plan even if you decide it’s not the right fit.
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Why we use AI, plainly: it writes from a knowledge base our team maintains and audits. We work through it line by line and pull anything the evidence stops supporting. The roadmap you get on Tuesday reflects what we corrected on Monday, and a human still reads it before you do.
Your school district must evaluate your child free of charge if you ask in writing, whatever your income and whatever the outcome (US, 34 CFR 300.111 and 300.301(b)). That route takes time and answers a different question than you do. This one starts today, from what you already know.
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A screener is a starting point, not a diagnosis. If your child might need formal accommodations (an IEP or 504 plan), or you suspect a vision, hearing or medical cause, pursue a professional evaluation too. That is the only route to those supports.
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