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337: Why Picky Eating Might Not Be Behavioral—It’s Biological

337: Why Picky Eating Might Not Be Behavioral—It’s Biological

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If every mealtime in your house feels like a showdown—tears, gagging, or flat-out refusal to try a bite—you’re probably exhausted and worried. You’ve bent over backwards with rewards, consequences, and endless negotiations, yet nothing seems to work. I want you to know—you’re not alone.

In this episode, I’ll share why your picky eater’s behavior is more than just “being fussy,” the biological factors that may be driving your child’s picky eating habits—from sensory sensitivities to gut health—and how you can bring more calm (and more healthy foods) back to the dinner table.

Why does my child’s picky eating feel like a constant battle?

If every mealtime feels like tug-of-war, you’re not imagining it. What looks like “bad behavior” is often your child’s biology at work. Many kids aren’t refusing food out of stubbornness—they’re reacting to sensory sensitivities or a stressed nervous system.

When we understand that picky eating is often about dysregulation instead of defiance, everything starts to shift.

Here are a few truths I want you to hold onto:

  • Behavior is communication. Food refusal can be your child’s way of saying, “This feels overwhelming.”
  • Sensory triggers are real. Textures, smells, and even temperatures can set off strong reactions.
  • It’s not bad parenting. Picky eating is a sign of a dysregulated brain—not a reflection of your efforts.
  • Power struggles backfire. The more meals feel like a battle, the harder it is for your child to feel safe around food.

Your child isn’t spoiled or dramatic—they’re struggling. And when we calm the nervous system first, we can bring more peace (and variety) back to the table.

When your child is dysregulated, it’s easy to feel helpless.

The Regulation Rescue Kit gives you the scripts and strategies you need to stay grounded and in control.

Become a Dysregulation Insider VIP at www.drroseann.com/newsletter and get your free kit today.

What biological factors cause picky eating in kids?

If your child’s picky eating feels bigger than just “not liking vegetables,” you’re right—biology often plays a huge role.

Research, including twin studies from King’s College London, shows that both genetic factors and environmental factors shape how kids develop food preferences. That means picky eating isn’t about willpower or stubbornness—it’s about what’s happening inside your child’s body and brain.

Common biological roots of picky eating include:

  • Gut issues like dysbiosis or inflammation that can shift cravings and digestion
  • Nutritional deficiencies (zinc, magnesium, B6) that impact appetite and mood regulation
  • Neurodevelopmental disorders such as ADHD, autism, anxiety, or OCD that make eating more restrictive
  • Early feeding experiences (reflux, choking, low muscle tone) that create stress around food
  • Genetics—studies show identical twins share more picky eating behaviors than fraternal twins
  • Connections to other eating disorders such as ARFID, which can overlap with restrictive eating patterns and disordered eating behaviors
  • In some cases, body image concerns may show up in older kids or teens, further complicating eating habits

🗣️ “Picky eating in kids isn’t about being spoiled or difficult—it’s biology shaping eating habits. Once you understand the root cause, you can take steps that actually help.” Dr. Roseann

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