While interest in functional medicine has grown exponentially, functional psychiatry remains underrecognized as a distinct subspecialty. As a result, many patients seeking root-cause approaches to mental health are treated outside of psychiatry—often without the depth of expertise required for safe and effective care.
Functional psychiatry builds on the principles of functional medicine, but it goes further. It brings a targeted, evidence-informed approach to micronutrients, genomics, neurobiology, and psychopharmacology—integrated in a way that is specific to psychiatric illness. It requires not just a different toolkit, but a different level of precision.
Training in functional medicine is not the same as training in functional psychiatry. And that distinction matters. They are related—but they are not interchangeable. And treating them as if they are is a disservice to patients.
I learned this the hard way.
In 2011, I saw a small sign tacked to a bulletin board at my local grocery store. A family medicine physician was advertising what he called “no medicine medicine.” At the time, I was a double board-certified psychiatrist, though I didn’t yet have language for the quiet dissatisfaction I felt. I just knew there had to be a better way to help my patients.
I called him out of curiosity. A week later, I was on a plane to Miami attending my first functional medicine conference—focused on mental health. I was hooked.
I opened an integrative psychiatry practice with a vision of doing things differently. But in truth, I was cobbling it together. I had powerful tools, but no clear structure for applying them specifically to psychiatric illness. I was practicing functional medicine—but not yet functional psychiatry.
That distinction became clearer when I began receiving referrals from a well-known functional medicine clinic nearby. These were complex psychiatric patients. It quickly became apparent that even highly skilled functional medicine practitioners were out of their depth. And if I’m honest, I wasn’t fully confident I knew what to do either.
What was missing wasn’t philosophy—it was training.
Fast forward fifteen years. On the verge of retirement, I came across a program called Psychiatry Redefined, focused specifically on functional psychiatry. I joined, hoping it would provide the structure I had been searching for all along.
It did. And I did not retire.
What are the Unique Aspects of Functional Psychiatry?
Functional psychiatry places a strong emphasis on highly targeted, evidence-informed protocols for micronutrient assessment and repletion in psychiatric populations. Particular attention is given to nutrients with well-established roles in brain function and neurotransmission, including magnesium, B vitamins, zinc, lithium (often in low-dose forms such as orotate), polyphenols, omega-3 fatty acids, amino acids, and key neurotransmitter precursors. This is the foundational first layer of functional psychiatry.
The increasing use of advanced genomic tools to guide interventions promises to make functional psychiatry even more precise. Current available tools enable us to uncover functional deficiencies not apparent through blood testing. For example, in psychiatry we aim for a B12 level higher than the lab defined upper range of normal and that is helpful but what if a patient has a genetic polymorphism whereby B12 is metabolized quickly and is not available for efficient use by the mitochondria despite an adequate blood level. So I believe genomics will advance functional psychiatry even further.
Alongside the repletion of nutrients or supporting inefficient pathways disclosed through individualized genomics, is the use of herbs, adaptogens, and medications when clinically appropriate. Most functional psychiatrists continue to use psychotropic medications, often in a more judicious and individualized manner, while also supporting patients who wish to safely taper or discontinue them. Deprescribing of psychiatric medications can be challenging and is more successful in the context of addressing micro and macro nutrient deficiencies.
A second defining feature is the specialized use of comprehensive laboratory evaluations tailored to factors most relevant to psychiatric symptoms. These often include assessments of micronutrients, minerals, fatty acids, organic acids, the gut microbiome, kryptopyroles, genomics, inflammatory markers, thyroid function, select hormones, and amino acids. Together, these data serve as a foundational starting point for a functional psychiatry approach.
Additional testing commonly used in broader functional medicine—such as evaluations of adrenal function, heavy metal burden, viral load, mycotoxins, environmental toxins (e.g., pesticides and endocrine disruptors), gut integrity, and mitochondrial function—may also be incorporated. However, these are typically pursued as a second layer of investigation, particularly in cases where patients do not respond to foundational interventions or when the clinical history suggests their relevance.
Why This Matters for Clinicians & Patients
Functional psychiatry remains underrecognized—and that has real consequences for patients.
Too many individuals seeking root-cause approaches to mental health are treated outside of psychiatry, often by well-meaning practitioners who do not have the specialized training required to manage complex psychiatric conditions. At the same time, many psychiatrists have not yet been exposed to the tools and framework that functional medicine offers.
We are leaving patients in the gap.
Training in functional medicine is not interchangeable with training in functional psychiatry. Having trained in both general functional medicine and functional psychiatry, I have experienced firsthand the distinct perspectives and clinical applications that functional psychiatry brings to patient care. These approaches are, in my view, essential for delivering truly advanced and comprehensive psychiatric care.
