Welcome to Restore Health LLC, where we embrace the principles of Functional Medicine

Functional Medicine Doctor in Darien, CT | Dr. Michael Duben

Functional Medicine Doctor in Darien, CT

If you’ve already seen specialists, tried different treatments, and still don’t have answers — you’re not alone. As a board-certified endocrinologist with over 20 years of clinical experience, I work with Darien patients who are ready for a second opinion that actually goes deeper, not just wider.

My practice, Restore Health LLC, is located in Fairfield, CT — approximately 20 minutes from Darien via I-95. I offer the kind of unhurried, thorough evaluation that a second opinion genuinely requires — not a rushed review of your prior records, but a full 90-minute consultation that starts from scratch.

My Fairfield office regularly sees patients from Darien, Tokeneke, and the Post Road corridor who are looking for a physician willing to investigate what others may have missed.


Why Darien Patients Seek a Second Opinion With Me

Darien patients tend to be well-informed, medically engaged, and already working with good doctors. But thyroid disorders, hormone imbalances, and metabolic dysfunction are among the most under-diagnosed and mismanaged conditions in medicine — even by excellent physicians.

I trained at Mount Sinai and completed my endocrinology fellowship at Montefiore/Albert Einstein under Dr. Norman Fleischer — one of the preeminent endocrinologists in the country — and Dr. Martin Surks, a world-renowned thyroid expert. That foundation allows me to identify what standard workups often miss.

What I investigate that a standard second opinion often skips:

  • Thyroid function beyond TSH — Free T3, Free T4, reverse T3, and thyroid antibodies
  • Hashimoto’s thyroiditis — the autoimmune root cause behind most hypothyroidism
  • Mitochondrial function and energy production — cellular-level disruptions that explain fatigue conventional labs never catch
  • Gut microbiome assessment when digestive, immune, or metabolic patterns suggest an underlying connection
  • Toxicology and environmental exposure testing — heavy metals, endocrine disruptors, and other factors that silently drive hormone dysfunction
  • Hormone optimization — testosterone, estrogen, and the full picture
  • Insulin resistance and cardiometabolic markers that predict problems years before diagnosis

A Second Opinion Done Right

Most second opinions are rushed. A physician reviews your prior labs, agrees or disagrees with the original diagnosis, and sends you on your way in 20 minutes. That’s not what I do.

At Restore Health LLC, your initial consultation is 90 minutes. I review your full history from the beginning, question assumptions in prior testing, and look at the complete hormonal and metabolic picture — not just the findings your previous physician focused on.

Common reasons Darien patients book a second opinion with me:

  • Diagnosed with a thyroid condition but treatment isn’t working
  • Told your labs are “normal” but symptoms persist
  • Conflicting diagnoses from multiple providers
  • Unexplained fatigue, weight changes, or hormonal symptoms with no clear cause
  • Want an endocrinologist’s perspective before committing to a treatment plan
  • Seeking care that combines traditional endocrinology precision with functional medicine depth

Board-Certified Endocrinology. Cash-Pay. No Time Pressure.

Restore Health LLC is a cash-pay, concierge practice. No insurance means no rushed appointments, no coverage-driven decisions, and no 10-minute consultations. A genuine second opinion requires time — and time is exactly what I provide.

For Darien patients who want follow-up flexibility, HIPAA-compliant telemedicine is available after your initial in-office visit.


Conditions I Evaluate for Darien Patients

  • Hypothyroidism — including optimization beyond standard lab ranges
  • Hashimoto’s Thyroiditis — autoimmune root-cause approach
  • Hyperthyroidism and Graves’ Disease
  • Thyroid Nodules — evaluation, monitoring, and FNA biopsy when indicated
  • Hormone Imbalances — testosterone, estrogen, adrenal
  • Medical Weight Loss — GLP-1 medications and metabolic optimization
  • Cardiometabolic Health — insulin resistance, cholesterol, blood sugar

Getting to My Fairfield Office from Darien

501 Kings Highway East, Suite 103, Fairfield, CT 06825 — approximately 20 minutes from Darien via I-95 (Exit 24). On-site parking available. Telemedicine follow-ups available after your initial visit for Connecticut residents.


Ready for Answers That Actually Make Sense?

If your current treatment isn’t working or your symptoms don’t match your diagnosis — it’s time for a different perspective. Call (203) 760-5544 or book online to schedule your consultation.

Restore Health LLC
501 Kings Highway East, Suite 103
Fairfield, CT 06825

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Also serving patients in Westport, Greenwich, Southport, and New Canaan.