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# Functional Medicine

func·tion·al med·i·cine - FUNK-shun-ul MED-ih-sin

## Definition

Functional medicine is a patient-centered, systems-based approach to healthcare that focuses on identifying and addressing the root causes of disease rather than simply treating symptoms. Practitioners of functional medicine view the body as an interconnected whole and seek to understand how genetic, environmental, and lifestyle factors interact to influence long-term health and complex chronic diseases.

Unlike the conventional medical model - which often categorizes disease by organ system and treats symptoms with medications or procedures - functional medicine organizes clinical thinking around core biological processes such as [hormone](/glossary/hormone) and [neurotransmitter](/glossary/neurotransmitter) regulation, immune function, digestive health, detoxification, energy [metabolism](/glossary/metabolism), and the structural integrity of cells and tissues. A functional medicine evaluation typically involves detailed health histories, advanced laboratory testing, genetic analysis, and assessment of lifestyle factors including diet, sleep, stress, movement, and relationships.

Functional medicine [has](/glossary/hyaluronic-acid) gained significant popularity in recent decades, particularly for managing chronic conditions like autoimmune diseases, digestive disorders, hormonal imbalances, chronic fatigue, and metabolic dysfunction. While some elements of functional medicine align with evidence-based practice (personalized nutrition, lifestyle modification, root-cause investigation), critics note that some practitioners recommend expensive testing panels and supplements with limited scientific support. As with any healthcare approach, the quality varies significantly between practitioners.

## Also Known As

Systems medicine Root-cause medicine 

## Key Facts

-   • The Institute for Functional Medicine (IFM) was founded in 1991 and has trained over 100,000 healthcare providers worldwide. 
-   • Functional medicine consultations are typically much longer than conventional visits - often 60-90 minutes for initial assessments. 
-   • Common diagnostic tools include comprehensive metabolic panels, food sensitivity testing, microbiome analysis, and hormone panels. 
-   • Cleveland Clinic opened its Center for Functional Medicine in 2014, lending mainstream credibility to the approach. 
-   • Functional medicine is not covered by most insurance plans, making it primarily accessible to those who can pay out of pocket. 

## How It Relates To Your Health

Functional medicine is most commonly sought by patients with chronic conditions that have not responded adequately to conventional treatments, including autoimmune diseases, chronic digestive issues, hormonal imbalances, chronic fatigue, and complex multi-system conditions. The emphasis on detailed patient history, advanced testing, and personalized treatment plans can provide valuable insights that conventional 15-minute office visits may miss.

If you're considering functional medicine, look for practitioners who hold conventional medical degrees (MD, DO, NP) with additional functional medicine training, as they can integrate both approaches. Be cautious of practitioners who discourage proven conventional treatments, recommend excessive supplement regimens, or use diagnostic tests without clear evidence of clinical utility.

## Related Terms

[Integrative Medicine](/glossary/integrative-medicine)[Microbiome](/glossary/microbiome)[Nutrigenomics](/glossary/nutrigenomics)[Biomarker](/glossary/biomarker)[Epigenetics](/glossary/epigenetics)

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2025-11-10

## Sources

1.  [About Functional Medicine](https://www.ifm.org/functional-medicine/) - Institute for Functional Medicine
2.  [Center for Functional Medicine](https://my.clevelandclinic.org/departments/functional-medicine) - Cleveland Clinic
3.  [What Is Functional Medicine?](https://www.webmd.com/a-to-z-guides/what-is-functional-medicine) - WebMD

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