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Functional & Performance Medicine

Root-Cause Functional Medicine in St. Johns, FL

In-depth, whole-person medical investigations to uncover why you feel unwell and rebuild optimal health.

All Systems. One Integrated Approach.

Conventional medicine is built to diagnose acute disease and manage chronic symptoms with pharmaceuticals. If your lab results keep coming back 'normal' while you still suffer from fatigue, brain fog, and body aches, you need a different perspective.

Functional medicine views the body as an interconnected system. We investigate how your genetics, gut microbiome, hormone cascade, stress levels, and environmental exposures interact.

At FunctionALL Health in St. Johns, FL, we spend 60 to 90 minutes listening to your entire health story during your initial consultation before constructing a personalized, evidence-based roadmap.

Our Root-Cause Approach

Beyond Symptom Suppression

We look for systemic connections — how thyroid health affects gut motility, how sleep affects blood sugar, and how stress impacts autoimmunity.

LocationSt. Johns, FL Office

Comprehensive Care Protocols

Comprehensive Functional Evaluations

We work alongside your existing primary care physicians and specialists to ensure seamless, coordinated care.

Advanced Biomarker Laboratory Panels

Autoimmune & Environmental Toxin Assessments (Mold, Heavy Metals)

Nutritional Deficiency & Organic Acid Testing

Custom Anti-Inflammatory & Supplementation Roadmaps

Integrative Primary Care Collaboration & Superbills

Symptoms We Commonly Resolve

Unexplained Chronic Fatigue & ExhaustionPersistent Joint, Muscle or Systemic InflammationUnresolved Autoimmune SymptomsSleep Disruptions & InsomniaPost-Viral Fatigue & Chronic Symptoms

Clinical Diagnoses Addressed

Hashimoto's & Autoimmune ThyroiditisRheumatoid & Autoimmune ConditionsChronic Fatigue Syndrome (ME/CFS)Environmental Mold & Heavy Metal ExposureMetabolic & Cardiovascular Risk Factors
Caroline Snelwar-Fletcher, FNP-C

Clinical Care Lead

Caroline Snelwar-Fletcher, FNP-C

Functional Medicine Director

Our care protocols are directly supervised by board-certified nurse practitioners specializing in functional, longevity, and metabolic medicine in St. Johns, FL.

Patient Questions

Frequently Asked Questions

What happens during a functional medicine initial consultation?

We spend 60 minutes conducting an exhaustive review of your complete medical timeline, diet, stress, sleep, and previous lab work before ordering comprehensive diagnostic panels.

Can functional medicine help if my doctor says my labs are normal?

Yes. Standard lab reference ranges are broad disease-detection thresholds. Functional medicine uses narrow 'optimal' ranges designed to identify dysfunction long before disease manifests.

Do you issue superbills for insurance reimbursement?

Yes. While we operate on a fee-for-service basis to provide unhurried, thorough care, we provide detailed superbills with CPT codes for submission to out-of-network PPO insurance plans.

Ready to find out what's really going on?

Your first step is a consultation — a real conversation about your health, your history, and what you want to change. No rush, no pressure, just clarity.