The Nourished Child

jill@jillcastle.com

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The Truth About Omega-6 Fats and Kids, with Researcher Dr. Martha Belury

July 23, 2026

You have probably seen it in your feed: "Seed oils are toxic." "Omega-6 fats cause inflammation." "Never cook with vegetable oil."   But is any of that actually true? And more importantly, what does it mean for what you are feeding your children?   In this episode, I sit down with Dr. Martha Belury, a registered dietitian and professor at The Ohio State University who has spent more than 30 years studying fatty acid metabolism. She is one of the few researchers in the world who has actual...

Does Your Child Need More Protein? What the Research Actually Says

July 09, 2026

Protein bars in the lunchbox. Protein powder in the smoothie. Protein added to everything from waffles to mac and cheese. If it feels like protein is suddenly everywhere! You're not imagining it. In this episode, I'm pushing back on the idea that more protein is automatically better for kids, walking through what the RDA actually recommends, what newer research on "optimal" protein intake really means, and the research-backed downsides of overdoing it, especially for younger kids. I also draw...

Puberty, Periods, and Your Daughter's Health: A Conversation with OB-GYN Dr. Melisa Holmes

June 18, 2026

If you have a daughter who is heading into puberty or is already in the middle of it, this episode is one you will want to save. Jill Castle sits down with Dr. Melisa Holmes, board-certified OB-GYN, co-founder of Girlology, and co-author of Youology: A Puberty Guide for Everybody. With more than 25 years of clinical experience in pediatric and adolescent gynecology, Dr. Holmes brings both the facts and the warmth that parents need when navigating this major chapter of their daughter's develop...