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 health
Simple food and lifestyle choices that support a healthy microbiome
How probiotics and prebiotics actually work in infants
The role of outside exposure and environment, even for families living in cities
Whether testing your baby’s microbiome can be helpful
How dads and the household environment play a role in a baby’s gut health

If 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