05/02/2026
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Did you know that a baby’s gut microbes help train their immune system — teaching the body what to react to, what to tolerate, and how strongly it should react?
But modern life is changing those microbes fast.
C-sections, antibiotics, formula feeding, and ultra-processed food additives are all shaping the early-life microbiome — during the most critical window for immune development.
In this episode of Healthy Gut, Healthy Kids, we’re joined by Alanna Collen, biologist, science writer and author of 10% Human, to unpack how modern life is reshaping our inner ecosystem — and what this means for children’s long-term health.
We talk about:�🦠 why humans are ecosystems�🛡️ how gut microbes protect the gut barrier�🔥 how the microbiome influences inflammation�👶 why infancy is a critical window�🍼 the role of birth, breastfeeding & bifidobacteria�💊 how antibiotics and C-sections shift microbial development�🌱 why fiber diversity is one of the most powerful tools for gut health
You don’t need perfection — but understanding the microbiome gives parents powerful knowledge in a world that’s changed faster than our biology has.