There is a tendency in mental health care to treat the brain as though it exists in isolation, disconnected from the rest of the body. We believe it’s not all in your head. The brain is a physical organ, shaped by the same biological forces that govern the rest of the body.

Disruptions in metabolism, nutrition, hormones, and immune function do not stay below the neck. What is happening in the body matters tremendously. It dictates the flow of mood states, cognitive capabilities, energy availability, and capacity for resilience. For many patients, it is a significant piece of a puzzle that has gone unsolved for years.

Functional psychiatry is a data-driven model. In virtually every other area of medicine, objective data is considered essential. You would not expect a cardiologist to treat a heart condition based on conversation alone. In this way, the functional approach raises the standard of psychiatric care.

Conventional Laboratory Testing with a Broad Scope

A comprehensive blood panel is required for a thorough evaluation because psychiatric symptoms are notoriously non-specific. Fatigue, low mood, anxiety, and brain fog can each stem from a wide range of dynamics. Furthermore, we are defined by our biochemical individuality, meaning that each person’s body operates uniquely, shaped by a confluence of genetic, environmental, and lifestyle factors.

Two patients can present with identical symptoms of depression, experiencing low mood, fatigue, and a loss of motivation. In one case, these symptoms could be driven by a vitamin B12 deficiency associated with gut microbiome dysbiosis. In the other, these symptoms could stem from metabolic dysfunction associated with insulin resistance. The symptom may look the same, but the underlying biology and the required treatment approach are entirely different.

Gathering that data with conventional laboratory testing is the natural first step. To obtain this critical information, we can pursue different paths depending on your situation and preferences.

Accessing Laboratory Testing

Bloodwork can be completed through your insurance provider or with a self-pay option.

When processed through insurance, costs vary widely and can be difficult to predict in advance. Some patients pay a modest copay while others receive bills of $600–800 or more. This depends on your policy, deductible, and the specific tests ordered.

The self-pay option offers a transparent, flat-rate alternative. Depending on the specifics of the comprehensive panel tailored to your needs, testing costs range from $200 to $ 400. For many patients, the self-pay route may be comparable to (or less expensive than) going through insurance. There is also the added benefit of knowing the cost upfront.

Patients also have the option to participate in DHA’s Reflux Program. Through this program, DHA will review your specific insurance plan and provide estimates of which tests are likely to be covered based on the diagnostic codes added by your provider. For tests that fall outside of your coverage, patients will be able to pay the market price. There is a flat-rate fee to enroll in the program. An added benefit of the program is that if DHA estimates a test would be covered by your insurance, and it turns out not to be, DHA will reimburse you for that cost directly.

This takes much of the financial uncertainty out of comprehensive lab testing and makes advanced diagnostics more accessible regardless of insurance limitations.

The Workup

No single test tells the whole story. An initial workup is deliberately broad, reflecting the reality that meaningful findings can emerge from any number of physiological domains. The following categories represent the essential pillars of a comprehensive functional psychiatric evaluation.

Metabolic Efficiency

Metabolism is the process by which the body converts food into energy. Every cell in the body depends on this process to function. The brain is the most metabolically demanding organ in the body. Metabolic dysfunction is one of the most prevalent and underrecognized contributors to psychiatric symptoms.

A standard metabolic evaluation begins with a Comprehensive Metabolic Panel (CMP), which provides a broad overview of blood sugar regulation, kidney and liver function, and electrolyte balance. This is paired with a hemoglobin A1C and fasting insulin.

Fasting Insulin is one of the most important metabolic markers that standard medicine routinely overlooks. Insulin is a hormone that regulates how cells access glucose (sugar) for energy. In insulin resistance, cells become less responsive to insulin’s signal, prompting the pancreas to produce increasing amounts to compensate. This process leads to diabetes over time. Insulin resistance develops gradually, and blood sugar levels can remain normal for years while insulin rises in compensation in the background.

Fat metabolism is closely connected to sugar metabolism. Imbalances in lipid levels could further signal metabolic strain or indicate a need for nutritional support. Cholesterol, in particular, has been widely demonized in popular culture. Yet cholesterol is an essential precursor for certain steroid hormones and an important structural component of every cell membrane.

Nutrient Status

The brain depends on a continuous and adequate supply of nutrients to function optimally. Vitamins, minerals, and essential fatty acids serve as the raw materials for neurotransmitter synthesis, cellular energy production, DNA repair, and the regulation of inflammation. When these building blocks are unavailable, brain function suffers.

Key nutrients that we evaluate using conventional laboratory testing include vitamin D, B vitamins, iron, vitamin C, and omega-3 fatty acids (among others).

Nutritional deficiencies are among the most common and most overlooked contributors to psychiatric symptoms. This is partly because deficiencies rarely announce themselves with obvious physical signs. In many cases, nutritional deficiencies go undetected because of how laboratory tests are interpreted by healthcare providers.

When a provider tells a patient their levels are “normal,” they usually mean the result falls within a standard reference range. Standard laboratory reference ranges are population averages. They tell us what is common, not what is optimal for health. A result within the normal range does not mean a level is sufficient to support brain health or overall well-being.

This is one of the defining distinctions of a functional approach. It’s not just about what tests are ordered, but also how those tests are interpreted. This is especially relevant in the context of nutrient deficiencies, where standard laboratory reference ranges can differ markedly from what research indicates is optimal for health.

There are different types of nutrient deficiencies. A primary deficiency is a problem of availability, such as poor intake. A secondary deficiency occurs when there are problems with utilization or sequestration. A classic example of this is normal blood folate levels in a patient with an MTHFR gene mutation. Folate is present in the blood, but impaired enzyme activity prevents its activation and utilization.

A functional provider considers not just whether a nutrient is present, but whether the body can actually put it to work. A normal blood level is a starting point, not a conclusion.

Hormone Balance

Hormones are chemical messengers that travel through the bloodstream to regulate bodily functions such as metabolism, energy levels, mood, sleep, stress response, and cognitive function. When hormonal balance is disrupted, the effects are rarely confined to a single system. They ripple outward, and they frequently surface as psychiatric symptoms.

Thyroid hormones are among the most consequential for brain health. The thyroid gland produces hormones that govern the metabolic rate of virtually every cell in the body, including neurons. Even subtle dysfunction in thyroid output can produce fatigue, depression, cognitive slowing, anxiety, and mood instability. Symptoms of hormonal dysfunction are easily and commonly misattributed to primary psychiatric conditions.

A standard TSH alone is an insufficient screen. TSH reflects the brain’s demand signal to the thyroid, but it does not tell us whether the thyroid is responding adequately or whether the hormones being produced are reaching their active form. For this reason, we evaluate TSH alongside free T3 and free T4 (the active and precursor forms of thyroid hormone).

We also look at pregnenolone and DHEA-S levels. Pregnenolone is the master precursor hormone. It’s the raw material from which most steroid hormones are synthesized. This includes cortisol, estrogen, testosterone, and progesterone. Pregnenolone itself has direct effects on memory, mood, and neuroprotection.

DHEA-S is an adrenal hormone that serves as a precursor to sex hormones. It has tremendous implications for energy, resilience, and cognitive vitality.

These markers also serve as indirect indicators of hypothalamic-pituitary-adrenal (HPA) axis function. The HPA axis regulates the body’s response to stress. Chronic psychological or physiological stress can dysregulate this system over time, leading to depletion of pregnenolone and DHEA-S. Identifying and addressing HPA axis dysfunction is frequently a meaningful piece of psychiatric treatment that conventional care overlooks.

Evaluating hormonal markers gives us deeper insight into one’s physiological ecosystem and identifies potential targets for intervention.

Inflammation Screen

Inflammation is the immune system’s primary defense mechanism. It’s a protective response designed to neutralize threats and initiate healing. It is essential for wound healing, recovery from illness, and routine cellular maintenance. However, persistent inflammation can wreak havoc on our body, contributing to corrosive damage to our cells and tissues, and driving psychiatric symptoms.

Research has established a meaningful bidirectional relationship between chronic inflammation and psychiatric illness. Chronic inflammation interferes with neurotransmitter synthesis, disrupts hormonal balance, perpetuates pain signaling, and affects nutrient availability. For many patients, undetected chronic inflammation is a significant and treatable driver of symptoms that has never been identified or addressed.

Every patient is screened with a high-sensitivity C-reactive protein (hs-CRP), a sensitive marker of systemic inflammation that can detect low-grade inflammatory activity well before it produces obvious physical symptoms. While CRP does not identify the source of inflammation, an elevated result tells us that the immune system is under strain and warrants further investigation.

Thyroid antibody testing is included for most patients. Autoimmune thyroiditis is one of the most prevalent autoimmune conditions and one of the most frequently missed contributors to psychiatric symptoms. The thyroid can be functionally compromised by autoimmune activity long before standard thyroid markers fall outside the normal range. Identifying elevated antibody levels early allows for intervention before the damage progresses.

Additionally, a celiac panel is included in every workup, regardless of whether a patient reports digestive symptoms. Celiac disease is an autoimmune condition triggered by gluten that causes significant intestinal damage and, consequently, profound impairment of nutrient absorption. It is frequently asymptomatic. Meaning, many people have no digestive complaints whatsoever and have no idea the condition is present.

Beyond the standard panel, additional autoimmune markers are ordered selectively based on a patient’s specific symptom picture and history.

Conclusion

A workup of this scope is intentional. We take psychiatric symptoms seriously. Rather than looking at them as isolated brain events, we understand that they are part of a whole-body phenomenon.

Comprehensive laboratory testing is the starting point. Nearly always, something meaningful and actionable is revealed. While this doesn’t give us all the answers, it helps us ask better questions.

From there, the workup often continues. Organic acid testing, kryptopyrrole testing, and root cause genetic panels allow us to dig deeper. The goal is to understand your biology with enough clarity and precision to support it in the most meaningful way possible.