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Raising healthy eaters isn’t easy. I know, because I have raised four of my own. Yes, I’ve had my ups and downs.

What parent hasn’t?!

I believe raising kids who enjoy eating well (and have the internal motivation to make nutritious choices) is one of the hardest jobs of parenthood.

Think about it. You face several challenges along the way, such as fussy eating, unhealthy food choices and eating habits, food allergies, sports nutrition, eating disorders, specialized diets for medical problems, and more… day in and day out.

Plus, you have to figure out how to get meals on the table, what to serve at snack-time, and the daily doubt about what food to feed your kid.

Child nutrition is my passion. Helping parents like you is my purpose.

Most parents want to raise a healthy child. They understand that food helps them achieve that goal.

But here’s the challenge: They’re not exactly sure what to feed their kids, or how to do it.

What makes the job of parenthood even more challenging? A child who is a difficult eater or who has a medical concern.

Pediatric Nutritionist Jill Castle in her kitchen

I’m Childhood Nutrition Expert Jill Castle, MS, RDN

I help parents raise nourished kids, inside and out. Because well-nourished kids who are healthy eaters are more likely to turn into healthy adults.

It doesn’t matter if your child is picky, an overeater, an unhealthy eater, or living with a medical concern like food allergies, ADHD, or extra, unhealthy weight.

All kids can learn how to eat well, and all parents can support their kids in this journey.

I am a 29+ year veteran in the specialized field of pediatric nutrition and I’ve had years of training and experience with infants, toddlers, children and teens.

I started out as a clinical pediatric dietitian at Massachusetts General Hospital (I also did my dietetic internship training there), working with children from birth through adolescence who were hospitalized for various medical concerns such as cystic fibrosis, gastrointestinal challenges, diabetes, eating disorders and more.

After obtaining my Master’s degree in pediatric nutrition, I moved to Boston Children’s Hospital where I worked exclusively as a pediatric nutrition support dietitian using intravenous nutrition for kids undergoing bone marrow transplantation, gastro-intestinal diseases, cardiac surgery and intensive care.

Motherhood Made Me a Better Pediatric Nutritionist

After working in hospitals for several years, I started my family. I became a stay-at-home mom to four kids, taking 9 years off from working to focus on raising them.

Boy, did I learn a lot about the day-to-day grind of cooking, snacks, meals, eating, feeding and all the stuff that goes into raising healthy kids who eat in a balanced way.

I talked about this further in my TEDx talk.

Jill Castle, MS, RDN Childhood Nutritionist and Pediatric Dietitian cutting a pomegranate with her son.

How to Feed Your Child

During my experiences as a pediatric nutritionist and mom, I developed an approach and philosophy for feeding kids good food in a loving way.

I call it The Nourished Child® Method. It’s a modern version of childhood nutrition, embodying food, feeding and keeping an eye on children’s developmental changes.

Based on this unique approach and years of working with families in my private practice, I created The Nourished Child® digital platform.

It’s chock full of nutrition classes, guidebooks and an entire website providing parent education in nutrition and feeding children.

I created this digital platform for parents because I want them to have a deeper understanding of food and nutrients, access a system and strategy for feeding their child in a balanced, nutritious way, and facilitate their child’s autonomy with eating.

I believe parents can live guilt-free, stress-free, AND nourish their child, inside and out using my approach.

You can’t fix your child’s eating challenges with food alone.

It takes more than changing the foods your child eats, or trying out a new, healthy recipe or fad diet to raise a healthy child.

It takes what I call the “a whole child approach,” and this philosophy shows up in everything I do with, and for, parents like you.

Bowl of fruit - Jill Castle, MS, RDN - Pediatric Nutritionist

The Nourished Child® Model

I had to learn how to feed my kids in a way that honored their food preferences, expanded their food repertoire, and cultivated their independence.

I developed The Nourished Child® Model, capturing a strategy and system with food and feeding to help kids tune in to their hunger and fullness signals so they better manage their appetite.

My method for addressing food, feeding and child development not only gives you a blueprint for raising a healthy kid, it allows you to determine where you might need more support and help for your child.

I’ve designed and developed many practical tips, systems and strategies to shepherd your child through growth and development, eating, and a healthy relationship with food. You can find all my classes and guides at my other website, The Nourished Child.

Nourish Your Child, Inside and Out

My foundational class called The Nourished Child® Blueprint includes:

  • The basics of food and nutrients for children, aged toddler to teen
  • The nurturing feeding practices that work to develop a healthy relationship with food
  • Childhood development know-how so you can teach your child about nutrition, motivate him to eat well, and cultivate autonomy and independence

This whole-child approach educates, supports and guides you to be the best parent you can be.

My systems and strategies are based on the research we have to date and my professional experience with real families like you.

Having a blueprint designed by a pediatric nutritionist will help you feel more confident, at ease, less frustrated, on the right track, and fulfilled as you feed and raise your child.

[If you’re curious about what it takes, I’ve developed this checklist to show you.]

Jill Castle MS, RDN Headshot

I help professionals and employees learn how to nourish kids through my workshops and trainings.

What Else Does Jill Castle Do?

In addition to my educational website, I work with other healthcare professionals, companies, organizations and brands.

Jill Castle doing a teen cooking show.

By the Way, What is a Child Nutritionist?

A pediatric dietitian/nutritionist is a healthcare professional (a RD which stands for registered dietitian) who has been extensively trained in the science of pediatric nutrition, generally obtaining a B.S. from a university or college.

A pediatric nutritionist has completed extensive training with children and parents, which has qualified him or her to sit for a national registration exam. After passing and obtaining certification, ongoing education and requirements must be completed every 5 years to stay knowledgeable, up-to-date and effective.

P.S. Here’s my official Pediatric Dietitian stuff:


Licensure and Registration:

  • Registered, Commission on Dietetic Registration, 1990 to present
  • Certified Dietitian/Nutritionist, State of Connecticut, 2013 to present

Highlighted Experience:

  • Clinical Pediatric Dietitian at Massachusetts General Hospital, 1989-1994
  • Nutrition Support Dietitian at Boston Children’s Hospital, 1994-1997
  • Owner, Pediatric Nutrition of Green Hills in Nashville, TN, 2008-2012
  • Owner, Jill Castle Nutrition LLC in New Canaan, CT, 2012 – present
  • Advisor, Parents magazine, Once Upon a Farm, Brainiac Kids, Needed, Sunnie
  • Writer, US News & World Report, USA Swimming, US Rowing, (now


I’m truly glad you’re here.

You can always reach me here.

Please stay in touch with me by joining my Facebook community or sign up for my newsletter.

Jill Castle MS, RDN

P.S.S.: 10 things you don’t know about me…The FUN Stuff!

  1. I’m a mid-Western girl, born and raised in Indiana.
  2. I didn’t like broccoli until I was in my early 20’s. (Believe me, my parents offered it over and over.)
  3. I played basketball from 5th grade through my Junior year in high school. I wanted to be a cheerleader my senior year, so I gave up basketball. Big mistake. I didn’t make the cheerleading squad. (sad face)
  4. Mentally, and to this day, I’ve always considered myself an athlete. Physically, I was never more than a recreational, mediocre one. (But I still go for it!)
  5. I truly believe being a good parent is a lot of thoughtful work, and probably one of the hardest (and often, thankless) jobs on the planet. But, there is no other job that is quite as powerful or rewarding.
  6. I love a man who can cook (and who’s not afraid to do laundry and clean a bathroom…and a dirty diaper). Luckily, I snagged one.
  7. I’m a sucker for self-improvement and self-actualization. I read Atlas Shrugged by Ayn Rand when I was 18. I’m a big fan of Brene Brown and Oprah. You could say I’m a thinker. I like to figure out why people do what they do and how to be better.
  8. I’m very, very afraid of heights and speed. I generally avoid these situations. However, I zip-lined in Costa Rica and that was HUGE for me. Did I really do that?!
  9.  I do my best work very early in the morning, but I love a good, long sleep. So, basically, I fight with myself to get out of bed every morning. I love that snooze button!
  10. I have a super soft spot for children. I love, love, love them. Everything about them. They inspire me and make me laugh. I love to look at the world through their eyes.