The state of children’s health in the U.S. is declining. Rates of obesity, pre-diabetes, autoimmune disease, food allergies, eczema, ADHD, anxiety, and depression are rising — and appearing earlier than ever.
In Episode 33 of the Gut Check Podcast, integrative pediatrician Dr. Elisa Song explains why many of these trends trace back to one common root: early gut microbiome disruption.
Her message is clear: symptoms don’t appear “out of nowhere.” And if we want to reverse the trajectory of childhood chronic disease, we have to move upstream — starting before birth.
Watch the full episode here:
👉 https://www.youtube.com/watch?v=Mm0EOch32UI
Why Childhood Chronic Disease Is Rising
When Dr. Song began practicing over 20 years ago, conditions like type 2 diabetes, severe food allergies, and early-onset anxiety were rare in children. Today, they’re increasingly common.
Instead of just managing symptoms, she asks a deeper question:
What changed in the early environment of our children?
Her answer:
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Antibiotic overuse
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Early microbiome disruption
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Ultra-processed foods
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Environmental toxins
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Chronic stress
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Loss of beneficial gut bacteria in infancy
The common thread? The pediatric microbiome.
Antibiotics, Overuse & Long-Term Mental Health Risk
Antibiotics are sometimes lifesaving. But they are also frequently overprescribed — especially for viral infections.
Dr. Song highlights several critical concerns:
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Antibiotics can be prescribed inappropriately at high rates.
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They are broad-spectrum and can wipe out beneficial gut bacteria.
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Early-life antibiotic exposure increases risk of:
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Eczema
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Asthma
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Food allergies
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ADHD
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Anxiety
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Behavioral concerns
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Even in adults, one round of antibiotics has been associated with an increased risk of anxiety and depression.
Her key reminder:
“Symptoms don’t just arise out of the blue.”
Gut disruption can precede mental health shifts by months or years.
The Gut-Brain Axis in Kids: ADHD, Anxiety & Mood
The gut microbiome plays a foundational role in:
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Neurotransmitter production (including serotonin)
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Brain development
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Immune signaling
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Inflammation regulation
Dr. Song explains that the developing infant microbiome directly influences developing brain circuitry. Disruption during critical windows — particularly under six months of age — may affect long-term neurological outcomes.
Research she discusses shows:
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Antibiotic exposure in infancy correlates with increased risk of ADHD, anxiety, sleep issues, and behavioral disorders.
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Infant gut bacteria (especially bifidobacteria) help train immune and brain development.
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Low microbial diversity is normal in babies — but loss of key strains is not.
This reframes the ADHD conversation. Instead of immediately asking, “Which medication?” the upstream question becomes:
What shaped this child’s microbiome early on?
Infant Reflux, Eczema & Early Gut Development
Two common early childhood concerns — reflux and eczema — are often treated symptomatically.
Dr. Song clarifies:
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Infant reflux is often normal due to an immature lower esophageal sphincter.
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Not all fussiness equals disease.
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Acid suppressing medications may alter the infant microbiome.
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Severe eczema may require short-term steroids — but root healing starts in the gut.
She emphasizes that babies’ gut microbiomes should be dominated by bifidobacteria, yet many infants today are deficient.
These bacteria help regulate:
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Immune tolerance
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Allergy risk
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Brain development
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Long-term inflammatory patterns
Maternal Gut Health & the First 1,000 Days
One of the most powerful parts of the conversation centers on the first 1,000 days of life — from conception through age two.
Dr. Song encourages parents to think even earlier:
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Optimize maternal gut health before conception.
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Support paternal microbiome health.
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Understand that antibiotic exposure during pregnancy also impacts the infant microbiome.
Her practical suggestion:
Slow down three to six months before conception to build microbiome resilience.
This is preventative pediatric health at its core.
Environmental Toxins & Ultra-Processed Foods as Microbiome Disruptors
Dr. Song reframes environmental toxins as not just “endocrine disruptors,” but also microbiome disruptors.
Chemicals such as:
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Phthalates
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PFAS (“forever chemicals”)
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Parabens
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Heavy metals
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Food emulsifiers
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Ultra-processed additives
may influence gut bacteria composition and intestinal permeability.
Rather than aiming for perfection, she encourages education and empowerment — teaching children how to make informed choices and build a resilient foundation.
What Parents Can Do Today: Microbiome Magic
Dr. Song outlines practical, evidence-informed steps parents can take to support pediatric gut health.
She calls them the foundations of “Microbiome Magic”:
1. Nourish the Microbiome
Focus on the “Three Fs”:
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Fiber
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Phytonutrients
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Fermented foods
If picky eating is a barrier, start with better swaps and cleaner packaged food options.
2. Reduce Microbiome Disruptors
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Avoid unnecessary antibiotics.
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Limit ultra-processed foods and artificial additives.
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Choose cleaner skincare and household products.
3. Support the Nervous System
Breathing, sleep, hydration, and movement all directly influence gut health through the vagus nerve and stress pathways.
4. Educate & Empower
Help kids understand they have an internal ecosystem. Ownership builds lifelong resilience.
The Big Takeaway
Childhood chronic disease is not random.
The rise in:
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ADHD
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Anxiety
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Eczema
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Food allergies
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Autoimmune disease
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Metabolic dysfunction
is deeply connected to early-life microbiome shifts.
The good news?
The microbiome is adaptable. With intentional support — especially in pregnancy, infancy, and early childhood — we can shift trajectories.
Listen to the full Gut Check Podcast episode here:
👉 https://www.youtube.com/watch?v=Mm0EOch32UI
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