Are You Setting Up the Healthy Habits Your Child Needs to Thrive? TAKE THE QUIZ!

Nutrition Advisor – Consultant

If you’re an organization or company focused on children and are looking to enhance your products and services for families, you’re in the right place.

I’m Jill Castle, mom of four and a pediatric dietitian with a knack for helping businesses, organizations and companies reach families with their products, services and messages.

I help companies make better food for, and programs that help, kids.

I have years of experience with infants, toddlers, children and teens, and of course, parents.

Brainiac Kids

It’s important to me that I work with food companies who want to improve nutrition for kids and make a difference in their lives.

A real difference.

Nutrition Consultant with a Special Focus on Children and Families

I’ve worked with many start-ups and companies that target the kid food space. Here’s what I bring to the table:

  • An up-to-date knowledge on current research and trends in childhood nutrition.
  • A unique understanding of parents, including their pressures, demands and desires.
  • Insight on kids and their parents, and the eating and feeding that goes on between them.
  • Experience working with start-ups and established companies.

Companies engage me as a consultant in myriad ways. Often, we start out on a project together to enhance a product or program and engage parents, which progresses into an advisory role, a spokesperson role, or both.

Once Upon a Farm baby food website

I’m hired for my insight, experience and expertise in childhood nutrition.

As your nutrition expert, I can help you achieve your goals, whether that be helping you develop or revamp your product line to doing short-term projects, such as informational videos or market research with parents.

Feel Sunnie website

Here’s How I Can Help

  • Design of kid’s programming, such as educational videos and experiences for parents and children.
  • Create branded, original content for your blog or newsletter.
  • Assess food products and compare and align them with a desirable nutritional content for kids.
  • Support companies as they define their nutrition messaging for their target audience, often parents.
  • Re-vamp products to improve overall nutritional content.
  • Feedback on key decisions around company direction.
  • Advocate and be a resource for the media.
  • Facilitate and support virtual and in-person gatherings, such as hosting a panel, think tank, roundtable, or event.
  • Develop branded print resources such as educational pamphlets and one-sheets.
  • Create copy and deliver educational and product-related videos.
  • Conduct parent focus groups and provide parent insight for marketing and advertising decisions.
  • Provide related research updates.
  • Assess product competition, specifically related to nutritional content.
  • Apply my pediatric nutrition expertise to unassociated products, programs, and audiences.
Teachable Tastes website

Here Are Things I Don’t Provide

  • Social media takeovers
  • Marketing messages
  • Influencer campaigns
  • Social media posts, stories, Lives, etc
  • Sponsored posts on my business website or The Nourished Child®

Selected Current & Past Work as a Nutrition Consultant and Advisor

  • Brainiac Kids
  • Once Upon a Farm
  • Needed
  • Sunnie
  • Southwest Dairy Farmers
  • ByHeart
  • Mott’s Teachable Tastes
  • National Cattlemen’s Beef Association
  • New England Dairy and Food Council
  • Oatly
  • Orgain

If you’re ready to bring a childhood nutrition expert onto your team to enhance your products or services, feel free to Contact me.

Official Bio

Jill Castle, child nutrition consultant and advisor

Jill Castle is the author of the forthcoming book, Kids Thrive at Every Size (Workman 2024) and one of the nation’s premier childhood nutrition experts. Known for her ability to blend current research, practical application, and common sense, Jill believes that children can thrive at every size. With her paradigm-shifting, whole-child approach, she inspires parents, healthcare professionals, and organizations that serve children and families to think differently about young people’s health and wellbeing.

A sought-after speaker, advisor, and media contributor, Jill has inspired a range of audiences with her up-to-date, practical insights on childhood nutrition. She serves as an expert reviewer for, has been featured as a guest expert in CNN, The Washington Post, The New York Times, Forbes, Newsweek, Time, and many other outlets, and has consulted with schools and organizations including Oatly, Brainiac, Once Upon a Farm, and Melissa & Doug.

Jill is the founder and CEO of The Nourished Child®, a nutrition education website and podcast for parents. She is the author of books including 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.

Jill is the mother of four adult-ish children and lives in Massachusetts with her husband.