Medicine That Sees the Whole Picture
FunctionALL Health was founded on a simple conviction: when you understand why the body is struggling, you can help it heal. Our practitioners bring decades of experience and an unwavering commitment to personalized, evidence-based care.
Functional Medicine Director
Caroline Snelwar-Fletcher, FNP-C
Caroline is a seasoned nurse practitioner from England with decades of experience in functional medicine. She brings an unconventional mindset and a deep commitment to active listening — often unlocking pivotal insights that help patients finally understand what's been holding their health back.
Her expertise lies in understanding how hormones, autoimmune conditions, endocrine health, and gut function work together as interconnected systems. Together with her patients, she cuts through the confusion and creates personalized roadmaps toward optimal wellness.
Caroline's life embodies a functional medicine philosophy: each day begins with gratitude, she nourishes her body with unprocessed, nutrient-dense whole foods, and prioritizes regular physical exercise. She lives in St. Johns County, FL with her husband and adult stepson.
Credentials & Training
- Board-Certified Family Nurse Practitioner (FNP-C)
- Functional Medicine Director, FunctionALL Health
- Decades of clinical experience in functional and integrative medicine
- Specialized in hormone optimization, autoimmune conditions, endocrine health, and gut function
Nurse Practitioner — Functional & Lifestyle Medicine
Susie Spell, MSN, FNP-C, DipABLM
Susie is a board-certified nurse practitioner who bridges cutting-edge interventions with each person's unique needs. With over 30 years of experience, she blends the best of modern medicine with a holistic, person-centered approach to help patients restore balance, energy, and vitality from the inside out.
She helps patients address fatigue, brain fog, hormone imbalance, menopause and andropause symptoms, sleep issues, weight loss resistance, gut concerns, and chronic conditions such as diabetes, high cholesterol, and high blood pressure.
Her services include hormone replacement therapy (HRT), medical weight loss, and lifestyle-based interventions for chronic disease prevention and management. Whether you're seeking to optimize health, rebalance hormones, or rediscover your energy, Susie helps you create lasting wellness where inner vitality meets outer radiance.
Credentials & Training
- Master of Science in Nursing (MSN)
- Board-Certified Family Nurse Practitioner (FNP-C)
- Diplomate, American Board of Lifestyle Medicine (DipABLM)
- Over 30 years of clinical experience
- Specialized in HRT, medical weight loss, and lifestyle medicine
Why "FunctionALL"?
The name is intentional. "Function" reflects our focus on how your body actually works — not just whether you have a diagnosable disease, but whether your systems are functioning optimally. "ALL" reflects our commitment to seeing the whole person: all systems, all symptoms, all goals.
We don't believe in treating your thyroid while ignoring your gut, or optimizing your hormones without addressing your sleep. Everything is connected, and our care reflects that.
At FunctionALL Health, we are dedicated to helping patients achieve optimal wellness through personalized, evidence-based care. We specialize in supporting patients on their journey to lasting health and wellness through every stage of life — in a welcoming environment where every patient feels supported, empowered, and cared for.
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.