Within Nutrition by Kylie

The first 1000 days of motherhood are often the hardest and also the most important for your baby’s developing body. In this episode, Kylie sits down with Cheryl Sew Hoy, founder and CEO of Tiny Health, for a grounded, science-backed conversation about how early gut development shapes immune, skin, and metabolic health both short-term and long-term. Cheryl is a mom of three and reviews infant microbiome lab results daily. In this conversation, she shares what she’s consistently seeing make the biggest difference during early life, and how small, realistic changes can support a baby’s gut without adding pressure or overwhelm. Rather than focusing on doing everything “perfectly,” this episode explores how parents can support gut health in practical, doable ways during pregnancy, postpartum, and early childhood. You’ll hear about: Why the first 1000 days are such a critical window for immune and metabolic healthSimple food and lifestyle choices that support a healthy microbiomeHow probiotics and prebiotics actually work in infantsThe role of outside exposure and environment, even for families living in citiesWhether testing your baby’s microbiome can be helpfulHow dads and the household environment play a role in a baby’s gut healthIf you’re pregnant, postpartum, or raising young children, this episode offers a clearer, calmer framework for understanding baby gut health and what actually matters most early on. Timestamps 0:00 Why the first 1000 days matter for long-term health 3:30 Cheryl’s story and what led her to Tiny Health 8:45 How early gut development supports immune health 14:15 Why small changes can make a big difference 18:30 How dads and the household environment contribute 25:15 Nature, outside exposure, and microbial diversity 31:00 Probiotics, prebiotics, and common misconceptions 37:30 Why “kill” approaches often miss the bigger picture 42:30 Can gut health be supported later in life? 48:45 Learn more about Tiny Health About the Guest Cheryl Sew Hoy is the founder and CEO of Tiny Health, a science-backed microbiome testing company focused on helping families understand and support gut health from the first 1000 days onward. A mom of three and serial entrepreneur, Cheryl founded Tiny Health after seeing firsthand how early gut imbalances can shape long-term health. Her work centers on replacing guesswork with clarity and helping parents make informed, biology-aligned decisions that support immune resilience over time. Website: https://www.tinyhealth.com Instagram: https://www.instagram.com/tiny.health/ Ready to go deeper? Apply for 1:1 coaching with Within Nutrition: https://aproaihffa9.typeform.com/to/JkpTBEVm Meet Kylie Kylie Ivanir, MS, RD, is a globally recognized dietitian and founder of Within Nutrition. She helps women worldwide improve gut health, balance hormones, and restore energy through personalized, biology-aligned nutrition and lifestyle support. Credentials: B.S. in Physiological Sciences, UCLA M.S. in Human Nutrition, Columbia University Medical Center Registered Dietitian, Columbia University