5 AGO 2026 · Did you know that 80% of our immune system is located in the gut, yet 90% of modern infants are missing a crucial superhero strain of good bacteria?
In this episode of Breakroom Mom, we sit down with Dr. Stephanie Culler—a Caltech-trained chemical engineer , CEO and co-founder of Persephone Biosciences , and lead author of My Baby Biome, the largest study profiling the infant gut microbiome in the US.
After years of researching cancer therapies , Dr. Culler pivoted her company’s mission after a life-changing conversation about her own six-month-old daughter. Today, she’s uncovering how modern industrial practices—like antibiotics , C-section births , and over-sanitization —are causing a multigenerational loss of essential gut microbes , leaving kids more vulnerable to eczema , food allergies , and asthma.
In this episode, we discuss:
- 🧬 The Gut-Immune Connection: How gut bacteria train a baby's developing immune system during their early years.
- 🧼 The Hygiene Hypothesis: Balancing clean habits without over-sanitizing away beneficial bacteria.
- 🍼 Symbiotics vs. Probiotics: What a "synergistic symbiotic" actually is and why human milk oligosaccharides (HMOs) act as fuel for good bacteria.
- 💩 Decoding Diaper Changes: What normal stool fluctuations tell us about an evolving microbiome.
- 💡 Practical Mom Hacks: Reusable smoothie pouches , finding protected weekend time , and what to look for on probiotic labels.
Whether you’re pregnant, navigating the infant/toddler years, or just trying to support your child’s overall immunity, this episode provides actionable, science-backed insights for every parent.