Functional Medicine, Explained
- Frankie Gan
- Oct 16, 2025
- 3 min read
Updated: Oct 17, 2025

If you’re health-conscious, dealing with nagging symptoms, or aiming to age well with steady energy and clear thinking, this page explains how I practice—and why it may feel different from a typical clinic visit.
Why I practice this way (a personal note)
Early in my clinical practice, I kept meeting people whose tests looked “normal,” yet they didn’t feel well. Conventional medicine is excellent for diagnosing and treating specific diseases. But it often lacks the whole-system lens to connect digestion, hormones, metabolism, sleep, mood, and immune patterns; the tools and time to search for root causes; and the training to coach sustainable lifestyle changes. Most visits don’t include structured work on nutrition, sleep, movement, and stress systems—despite these being the main drivers of health for most people.
That gap led me to deepen my training in lifestyle, integrative, and functional medicine, genetics, and prevention research. My goal is simple: connect the dots, personalize the plan, and sustain and optimize to see durable, measurable change.
What functional medicine is (and isn’t)
In short: a systems-based, prevention-oriented approach that looks for drivers of symptoms and builds sustainable daily habits. We add advanced testing (biomarkers, microbiome, genomics, wearables) to confirm and refine our plans.
It isn’t: a replacement for conventional care, a “test everything” philosophy, or a supplement prescription. It’s a structured process and a partnership.
A whole-system view (macro lens → micro clarity)
Functional medicine treats the body as an interconnected network rather than isolated organs. With a macro view (your story, routines, environment) and micro tools (targeted diagnostics), we ask “why”—where is the imbalance—and then design lifestyle and precision nutrition to restore balance.
Seven core physiological processes we pay attention to:
Assimilation & Elimination — digestion, absorption, and waste clearance
Detoxification — transforming and clearing internal/external toxins
Defense & Repair — immune recognition and resilience
Cell Communication & Hormones — signaling that coordinates systems
Transport — blood/lymph circulation delivering what cells need
Energy — mitochondrial production and use of cellular energy
Structure — musculoskeletal and tissue integrity that supports function
When one process is off, others often compensate—symptoms show up where the system is most vulnerable, not always where the problem began.
How it’s different (principles I use)
Whole system, not single symptom — connect digestion, hormones, metabolism, sleep, mood, and immune patterns.
Context first — plans must fit your routines and preferences.
Stewardship of tests — basics before advanced; test when it changes action.
Behavior-change skill — small repeatable steps beat perfect, unsustainable plans.
Track what matters — symptoms, function, and a few key biomarkers.
When this approach helps
Persistent symptoms despite “normal” tests (fatigue, bloating, sleep/mood swings)
Metabolic concerns (glucose, lipids, weight changes)
Hormonal transitions (e.g., perimenopause)
Gut–immune issues (IBS-type symptoms, food reactions, low-grade inflammation)
Prevention & performance goals (steady energy, cognition, travel/shift routines)
Healthy aging (strength, cardiometabolic and brain health)
Note: If you have acute red-flag symptoms or urgent conditions, seek conventional medical care first. Functional medicine can support recovery later.
The four steps we’ll use
Evaluate — Map your baseline: story, routines, exam, and key markers.
Personalize — Turn findings into a plan that fits you.
Maintain — Track progress and refine them.
Optimize — Layer strategies for resilience, longevity, and performance.
Before we meet: 7-Day Personalization Mini-Project
Bring a few insights that make your first visit truly personal.
1) Pick your focus (choose 1–2)
Energy & focus
Sleep quality
Digestion / bloating
Mood & stress
Metabolic balance (cravings, weight, glucose)
Pain / inflammation / allergies
2) Daily notes
Energy
Diet (You can take photos of your meals)
Sleep window: Bed → Wake (night wakings?)
Any symptoms today? (e.g., bloating, headache, cravings)
Supplements and medications list
3) Awareness check — three quick lists
Top 3 issues I most want to address
Top 3 things I’m most willing to change (now)
Top 3 things that feel most challenging to change (for now)
Bring your 7-day notes (photos/screenshots are fine). We’ll use your observations to decide whether any testing would truly change next steps—and to design a plan that fits your life.
A simple next step
If this approach resonates, start the 7-day mini-project above. When you’re ready, we’ll review your notes together and map a plan that’s personal and practical.


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