Hannah was twelve years old when fear began to shape the boundaries of her world.

It started with nausea—or more precisely, the fear of nausea. The possibility of vomiting became so overwhelming that she stopped eating in public spaces. A television show that referenced it could trigger a panic attack. School, once a place of learning and friendship, became a daily source of dread.

Hannah’s diagnosis was clear: emetophobia and panic disorder. Her suffering was very real.

Like many patients, Hannah began with a conventional, evidence-based approach. Sertraline was introduced at 25 mg and gradually increased to 150 mg at bedtime. There was some benefit—but not enough to give her back her childhood. She was still anxious, still avoiding, and increasingly struggling socially and emotionally with feelings of inadequacy.

When the Biology Is Hard to Reach

There was another challenge—one that delayed the deeper clinical work we knew was needed.

Hannah was terrified of needles. For nearly 18 months, she was unable to complete bloodwork. During that time, we continued to treat symptoms while waiting for the opportunity to understand what might be happening beneath the surface.

When she was finally able to complete lab testing, the results changed the entire clinical picture.

What the Labs Revealed

Hannah’s bloodwork showed evidence of celiac disease, which was later confirmed by a gastroenterologist through endoscopy. This wasn’t just a dietary preference—it was an autoimmune condition affecting her ability to absorb nutrients.

The labs also revealed:

• Severe iron deficiency
• Vitamin B12 deficiency
• Vitamin D deficiency (common in patients living in New England, but clinically meaningful nonetheless)

In other words, her nervous system had been trying to function without some of its most essential biological building blocks.

From a Functional Psychiatry perspective, this matters deeply. Iron, B12, and vitamin D all play critical roles in energy production, neurotransmitter synthesis, immune regulation, and brain function. When these systems are compromised, anxiety and mood symptoms can become more severe, more persistent, and more resistant to treatment.

Treating the Root Cause, Not Just the Symptoms

With this new understanding, Hannah’s care plan expanded.

• She stopped consuming gluten entirely.
• We corrected her nutritional deficiencies with targeted supplementation.
• Her medication was transitioned to fluoxetine to support continued nervous system stabilization.

And then, over the next six months, the changes began to unfold.

The Six-Month Turning Point

Hannah returned to class consistently. She ate in the school cafeteria again. The fear of vomiting faded. The panic attacks stopped.

Her anxiety became well controlled—and her body began to offer its own confirmation. When symptoms briefly resurfaced, her labs showed evidence of gluten exposure, reinforcing the biological connection between her immune system, her gut, and her mental health.

This wasn’t just improvement. This was pattern recognition, personalized care, and root-cause psychiatry in action.

Why This Matters for Clinicians

Hannah’s case isn’t about choosing between medication and functional approaches. It’s about integration.

Medication helped calm her nervous system. Labs revealed what her biology was missing. Nutrition and immune awareness helped restore balance.

Together, they gave Hannah back something no single intervention had been able to provide on its own: a sense of safety in her body and in the world.

For clinicians, this is where Functional Psychiatry becomes transformative:

• It helps explain why some patients only partially respond to medication
• It provides objective data to guide long-term care
• It deepens clinical confidence and expands therapeutic possibility

A Bigger Picture with Functional Psychiatry

Every Fellow who comes through Psychiatry Redefined tells us a version of the same story:
“I finally understand why my patients weren’t getting better—and now I know how to look for what’s been missing.”

Hannah didn’t just regain her ability to eat lunch at school, she regained her childhood.

And that is why we do this work.

Clinical Takeaway

When anxiety, phobia, or panic appear resistant to conventional care, consider the role of immune activation, malabsorption, and nutritional deficiencies. Iron, B12, vitamin D, and food sensitivities can profoundly shape nervous system function—and addressing them can change the entire trajectory of care.