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I’m a pediatric nutritionist who writes about childhood nutrition and feeding kids.

And my learning curve has been steep.

Early in my career as a pediatric dietitian working in hospitals, I wrote scientific research articles and textbook chapters, collaborating with physicians and researchers.

In 2009, a year after I started my own business, I began a blog and wrote a weekly submission for years. I’m pretty sure my blog was key to securing my first agent and publisher.

Since then, I’ve published 5 books, two with traditional publishers and three that I published myself under the imprint The Nourished Press.

I pride myself on translating the science into understandable language, tips and practical advice, making it easy for parents to use the information right away.

You can see this on The Nourished Child®, my nutrition education website for parents, and the business-oriented articles I write on this website for nutrition, other healthcare practitioners and businesses.


Over my 30-year career, nothing has shaped my insight on childhood nutrition than being a mother to four children and working directly with kids and their families in my former private practice.

Through both experiences, I developed a model for child nutrition that integrates, food, feeding and child development. This “Whole Child Nutrition” approach drives everything I do and is infused in my writing.

My experiences as a childhood nutritionist and mom have shaped my vision about nutrition.

In 2011, I partnered with a like-minded dietitian and wrote a comprehensive resource on childhood nutrition called Fearless Feeding: How to Raise Healthy Eaters from High Chair to High School, which published in 2013.

Fearless Feeding breaks down nutrition and feeding for each stage of childhood, including infancy, toddlerhood, childhood and adolescence. It’s considered an essential resource for teaching prospective nutrition professionals in the pediatric space and is used by several universities across the United States.

Fearless Feeding by Jill Castle, MS, RDN and Maryann Jacobsen, MS, RDN
The 2nd Edition of Fearless Feeding

Shortly after Fearless Feeding was published, I proposed another title for publication. A book about sports nutrition for kids. My own kids were avid athletes and I was seeing a growing population of young athletes in my practice. I realized I didn’t have a resource to suggest to them, so I decided to write one myself.

Eat Like a Champion by Jill Castle, MS, RDN

In 2015, Eat Like a Champion: Performance Nutrition for Your Young Athlete was published.

This book was written for parents of young athletes aged 8 to 18, and their coaches. Eat Like a Champion showcases the science in sports nutrition for the young athlete, and offers a realistic, practical way to think about food for the growing athlete, along with how to modify food for training, competition and time off.

Not only do you get the nutrition science aimed at kid and teen athletes, you get practical advice for how to put it into the daily routine.

This book is a game changer for young athletes who want to fuel for athletic performance and growth! 

Author Jill Castle, MS, RDN

“I make the evidence come alive and translate it into practical information families and professionals can use right away.”


My Self-Published Books

In 2017, I started The Smart Mom’s Guide series, a series of short, easy-to-read books that focused on a specific topic in child nutrition. I decided to self-publish out of curiosity and I wanted to get books out faster than the traditional route.

So far, I’ve written a book about starting solids for infants and a book about developing healthy snacking habits in children in The Smart Mom’s Guide series.

I also wrote Try New Food, a book about picky eating, from developmentally “normal” picky eating to Avoidant Restrictive Food Intake Disorder (ARFID). Try New Food is written in a workbook format, allowing the reader to dive into the root of a child’s picky eating – from genetics to parenting – and shows caretakers how to work with children to overcome it.

Below you can find each of these books on Amazon. They are also available in bookstores, as well as on The Nourished Child® as a PDF, downloadable version.


Jill Castle, MS, RDN - Contributing Author in Tough Love

I was a contributing author to ToughLOVE, a parenting anthology from Simon & Schuster.


I Have Nutrition E-Guides for Parents, Too

I love to write short, helpful guides for parents so they better understand nutrition concepts for kids and get creative ideas to make food fun, tasty and nutritious. From mini-recipe books to deep dives on parenting and eating disorders (and much more!), I make sure to make these short and sweet and highly valuable.

Here are my current offerings and there are more in the works!


Childhood Nutrition Articles

As a writer and nutrition consultant, I’ve written for other websites and organizations. In the past I wrote for USA Swimming, US Rowing, the National Alliance for Youth Sports magazine called Sporting Kids, USA Field Hockey, and Golf Magazine.

For years, I wrote for Bundoo, a website for parents of children ages 0-4 years, About.com (now Verywell.com), and Wee Feed. 

I also share my business writing and thoughts on childhood nutrition over on Medium.

Last, as part of my nutrition consulting agreements, I have written articles for my client’s websites.


My Official Bio

Jill Castle, MS, RDN

Jill Castle is one of the nation’s premier childhood nutrition experts. Known as a paradigm shifter who blends current research, practical application and common sense, Jill inspires audiences to think differently about feeding kids.

A sought-after speaker, advisor, and media contributor, Jill has inspired audiences from the TEDx stage as well as a range of medical, government and parent audiences. Jill serves on the Board of Advisors of Parents Magazine, and has been featured as a guest expert in CNN, The Washington Post, The New York Times, Forbes and many other outlets. She helps startups and companies in the kid food space as an advisor and consultant.

Jill is the creator of The Nourished Child®, a parent nutrition education website, and author of the books, Eat Like a Champion, Try New Food, The Smart Mom’s Guide to Starting Solids, The Smart Mom’s Guide to Healthy Snacking, and co-author of Fearless Feeding. She interviews experts on her podcast of the same name.