Longevity Medicine
What Is Functional Medicine?
Last reviewed: May 2026 · Haute MD Editorial Team
Functional medicine is an approach to medicine focused on identifying and addressing the root causes of chronic disease rather than managing symptoms. It takes a systems-based view examining how genetics, lifestyle, diet, environment, stress, and gut health interact to create or prevent disease. Functional medicine physicians typically spend more time with patients and order a broader range of testing to identify underlying imbalances.
How it differs from conventional medicine
Conventional medicine is symptom and diagnosis-driven — a patient presents with a symptom, receives a diagnosis, and is prescribed a treatment. Functional medicine asks why the symptom developed, addressing underlying causes through nutrition, lifestyle modification, supplementation, and medications.
What functional medicine physicians assess
Gut microbiome and digestive function, food sensitivities and nutritional deficiencies, hormonal imbalances, inflammatory markers, toxic burden, mitochondrial function, adrenal and thyroid function beyond standard panels, and genetic polymorphisms.
Functional medicine and longevity
Significant overlap exists — both focus on root causes, advanced diagnostics, and lifestyle optimization. Longevity medicine specifically targets aging biology and healthspan extension; functional medicine has a broader focus on restoring function and addressing chronic disease.
Frequently Asked Questions
Is functional medicine evidence-based?
Functional medicine combines well-established evidence-based medicine with some interventions having less robust evidence. Look for physicians with conventional medical training and board certification in addition to functional medicine training.
What is the IFM?
The Institute for Functional Medicine is the primary training and certification organization. IFM Certified Practitioners (IFMCP) have completed a rigorous training program.
Does insurance cover functional medicine?
Some services may be covered. Many functional medicine physicians operate on a direct-pay model. Advanced testing is typically not covered.
What conditions does functional medicine treat best?
Chronic fatigue, autoimmune disease, digestive disorders, hormonal imbalances, metabolic syndrome, and weight management are particularly well-addressed by the functional medicine approach.
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