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What free at-home bloodwork option is included with my membership?

As part of your membership, you receive the 'Longeviti Panel' testing twice a year, evaluating over 90 biomarkers.

Are the cost of supplements or prescriptions included in the membership fee?

The membership fee provides access to our range of supplements and prescription services; however, the costs for these items are not included and are priced separately.

The Essential Guide to Functional Health Testing: Beyond Basic Blood Work

In the quest for a longer, healthier life, we often look to exercise, nutrition, and mental well-being as primary contributors to our overall health. While these are undeniably important, there’s another critical piece of the puzzle that often gets overlooked—bloodwork and biomarker testing. This powerful tool can unlock insights into your body’s internal health, helping you optimize your lifestyle and prevent chronic illnesses. Here's why regular bloodwork and biomarker monitoring are essential for achieving longevity.

Topic - Diagnostics

22 Sept 2025 • 16 min read

The Essential Guide to Functional Health Testing: Beyond Basic Blood Work
What is functional health testing?
How it's different from standard blood work
Why it focuses on root causes, not just symptoms
Why traditional testing isn't enough
Problems with standard lab ranges
Delayed diagnosis and reactive care
The need for early detection and prevention
Other types of functional tests you should know
Hormone testing (including DUTCH test and thyroid panels)
Functional gut health testing (stool tests, SIBO, microbiome)
Nutritional and metabolic testing
Toxin screening and heavy metal tests
Genetic and DNA methylation testing
Food sensitivity and allergy testing
How the testing process typically works
Initial consultation and test selection
At-home bloodwork, saliva testing, and sample collection
Lab analysis and biomarker interpretation
Creating a personalized treatment plan
Benefits of functional medicine testing with Geviti
Personalized and targeted care
Tracking progress and adjusting plans
Empowering patients with data
Preventing chronic disease before symptoms appear
Conclusion

The Essential Guide to Functional Health Testing: Beyond Basic Blood Work

Nearly 60% of U.S. adults live with at least one chronic disease, and one in four manage multiple conditions simultaneously. These health problems account for 86% of all medical expenses. Yet conventional medicine typically waits until symptoms appear before conducting comprehensive testing.

Functional lab testing takes a proactive approach by assessing your health before problems develop. This powerful diagnostic tool helps physicians identify underlying issues and create personalized treatment plans. It's particularly effective for complex, chronic conditions that often elude conventional diagnosis.

We believe prevention is essential—waiting until symptoms appear is simply too late. Unlike conventional medicine, functional practitioners take a comprehensive, individualized approach, beginning with a detailed health history that examines your diet, lifestyle, and genetic factors. This guide explores the world of functional health testing—from hormone assessments and gut health analyses to toxin screenings and genetic testing. At Geviti, we're committed to preventing chronic disease and supporting longevity through early detection and personalized care.

What is functional health testing?

Functional health testing represents a paradigm shift in health assessment. Rather than waiting for disease to manifest, this approach examines how well your body systems function at the cellular level. It provides a comprehensive evaluation that identifies connections between systems to detect issues before they develop into clinical conditions.

How it's different from standard blood work

The fundamental difference between functional and conventional testing lies in their purpose and interpretation. Standard blood work aims to identify existing diseases, while functional testing evaluates overall body function to detect imbalances before they become diseases. Conventional testing typically examines symptoms in isolation, whereas functional testing looks for connections between symptoms to identify underlying patterns.

Reference ranges represent another key difference. Conventional labs use broad "disease ranges" designed for diagnosis, while functional testing employs narrower "optimal ranges" that reflect ideal health. For example, the functional range for blood sugar might be 85-100 mg/dl, compared to the conventional range of 65-110 mg/dl. This means levels considered "normal" by conventional standards may actually indicate developing problems when evaluated through functional testing.

Functional testing offers several advantages over standard approaches:

Complete analysis - Examines multiple markers simultaneously for a comprehensive assessment
Early detection - Identifies subtle imbalances before disease development
Personal insights - Evaluates results based on your unique biochemistry
Optimal vs. normal - Focuses on achieving ideal health, not merely avoiding disease

Functional testing also includes specialized assessments often overlooked by conventional medicine, such as nutritional status, toxin burden, and gut health.

Why it focuses on root causes, not just symptoms

The core philosophy of functional health testing is identifying and addressing the root causes of health problems rather than simply treating symptoms. This approach recognizes that symptoms often serve as signals of deeper imbalances within body systems.

When you describe symptoms to a conventional doctor, you'll typically receive treatment aimed at alleviating those specific complaints. A functional medicine practitioner will instead ask why those symptoms developed in the first place. This question initiates a comprehensive investigation into potential root causes—examining diet, laboratory findings, health history, sleep patterns, and environmental exposures.

The focus on root causes stems from understanding the interconnected nature of body systems. For instance, digestive issues might actually originate from hormonal imbalances, or fatigue could result from nutritional deficiencies rather than requiring a stimulant. Through detailed testing, practitioners can identify these connections.

This approach also views illness as a systemic imbalance rather than an isolated disease entity. Instead of relying solely on conventional diagnosis, treatment targets multiple areas simultaneously—reducing inflammation, supporting gut health, enhancing detoxification pathways, and correcting nutritional imbalances.

By identifying root causes early, functional health testing enables intervention before symptoms manifest. This makes it a powerful tool for longevity and disease prevention—perfectly aligned with Geviti's philosophy that prevention through comprehensive testing is essential for avoiding chronic disease.

Why traditional testing isn't enough

Conventional medical testing often leaves patients in a frustrating limbo—not sick enough for a diagnosis, yet not feeling well. Standard blood tests frequently miss developing health issues, causing unnecessary suffering and delayed diagnosis until conditions have progressed significantly.

Problems with standard lab ranges

Standard lab ranges pose a significant limitation in conventional medicine. These ranges primarily detect disease states rather than optimal function and are based on statistical averages from the general population—not what constitutes ideal human health.

The problem lies in how these ranges are established. Conventional lab ranges are typically calculated using a bell curve of results from people who visited that lab—most of whom sought medical attention because they felt unwell. This creates a critical flaw: what's deemed "normal" is actually based on results from predominantly sick individuals.

Consider thyroid testing—a TSH level of 4.5 might be labeled "normal" by conventional standards, though many people experience significant symptoms at levels above 2.0. Similarly, vitamin D levels considered "sufficient" by conventional ranges often fall well below what research indicates is optimal for immune function and disease prevention.

Another limitation is the binary nature of conventional test results—they typically only indicate whether you're within or outside the "normal" range. This reductive approach misses the subtle gradations of health, where early dysfunction occurs long before clinical disease. By the time markers fall outside conventional ranges, problems have often been developing for years.

Delayed diagnosis and reactive care

The conventional medical system operates primarily on a reactive model—waiting until symptoms become severe enough to trigger abnormal test results before intervening. This approach creates a fundamental problem: disease processes are often well-established by the time conventional tests detect them.

Research shows that diabetic complications begin developing when fasting glucose reaches 126 mg/dL—the current diagnostic threshold. However, metabolic dysfunction actually begins at much lower levels. This pattern applies to numerous conditions, from thyroid disorders to cardiovascular disease.

Most concerning is that this reactive approach fails to account for individual variations. Optimal function varies dramatically between people based on genetics, environmental exposures, and personal health history. Conventional testing cannot capture these nuances with its standardized approach.

The consequences of delayed diagnosis extend beyond prolonged suffering. Early-stage imbalances are typically far easier to reverse through lifestyle modifications and targeted interventions. Once disease processes become entrenched enough to register on conventional tests, treatment often requires more aggressive pharmaceutical approaches with potential side effects.

The need for early detection and prevention

Early detection forms the cornerstone of truly effective healthcare. Functional testing provides a crucial window into developing problems before they manifest as diagnosable disease—often years or even decades earlier.

The power of this approach becomes evident when we understand disease progression. Most chronic conditions follow a predictable sequence:

Initial cellular dysfunction and biochemical imbalances
Inflammatory responses and compensatory mechanisms
Tissue damage and functional decline
Symptomatic disease expression
Diagnosable pathology

Conventional testing typically only detects stages 4-5, while functional testing can identify issues at stages 1-3, when intervention is most effective. This enables a fundamentally different healthcare approach—one focused on preventing disease rather than managing it after onset.

Beyond early detection, functional testing reveals connections between body systems. This comprehensive view allows practitioners to address underlying imbalances rather than treating isolated symptoms. For example, functional testing might reveal how gut dysfunction contributes to seemingly unrelated symptoms like cognitive issues, skin conditions, or joint pain—connections conventional testing would likely miss entirely.

As chronic disease rates continue rising despite advances in acute care, the need for this preventive approach becomes increasingly apparent. Truly effective healthcare requires moving beyond the limitations of conventional testing and embracing comprehensive functional assessments that detect problems before disease takes hold.

Other types of functional tests you should know

Beyond standard blood work, functional medicine offers specialized testing that provides deeper insights into your body's systems. These advanced assessments help identify imbalances before they manifest as symptoms, supporting Geviti's preventive approach to healthcare.

Hormone testing (including DUTCH test and thyroid panels)

The DUTCH (Dried Urine Test for Comprehensive Hormones) test stands out as a premier hormone assessment. It analyzes 35 different hormones including estrogen, progesterone, testosterone, DHEA-S, and cortisol along with their metabolites. It provides daily free cortisol patterns that offer insight into adrenal function and stress response. This comprehensive analysis helps practitioners develop more effective, personalized treatment plans than conventional blood tests can provide. Thyroid panels examine multiple markers to assess thyroid function, which affects nearly every cell in the body, influencing everything from metabolism to cognitive function.

Functional gut health testing (stool tests, SIBO, microbiome)

Comprehensive stool analysis evaluates digestive function, intestinal inflammation, and the microbiome—crucial components of overall health. These tests detect gut imbalances that may drive symptoms like bloating, fatigue, and systemic inflammation. For suspected small intestinal bacterial overgrowth (SIBO), hydrogen breath tests measure gases produced by bacteria after consuming a sugar solution. Microbiome testing analyzes the various bacteria, fungi, viruses, and other microorganisms in your gut, providing insights into imbalances that affect digestive health and broader wellness.

Nutritional and metabolic testing

Metabolic testing precisely measures how efficiently your body uses oxygen and produces energy. These assessments evaluate resting metabolic rate (calories burned at rest), maximum oxygen volume (VO2 Max), and lactate threshold to determine your unique metabolic profile. Additional markers like nutritional organic acids can reveal vitamin deficiencies and metabolic inefficiencies. This data helps develop individualized nutrition and exercise strategies based on how your body uniquely processes carbohydrates and fats during activity.

Toxin screening and heavy metal tests

Heavy metal testing checks for potentially harmful metals like arsenic, lead, mercury, and cadmium in your body. These tests typically analyze blood, urine, hair, or fingernail samples, with each method offering different insights into recent versus long-term exposure. Early detection allows for intervention before metals cause permanent damage to organs and nervous systems. Signs of heavy metal toxicity include fatigue, cognitive issues, digestive problems, and muscle weakness—symptoms often misattributed to other conditions.

Genetic and DNA methylation testing

DNA methylation testing examines how genes are regulated through the attachment of methyl groups to DNA. This process controls gene expression and influences crucial functions like DNA repair and detoxification. Methylation imbalances can result from genetic variations or environmental factors, potentially increasing risks for conditions like cardiovascular disease, mood disorders, and cognitive decline. These tests provide personalized insights that help practitioners develop targeted protocols to support optimal methylation function.

Food sensitivity and allergy testing

Food sensitivity testing identifies delayed immune reactions (IgG responses) that can occur hours to days after consumption, distinct from immediate allergic (IgE) reactions. These tests help pinpoint triggers for symptoms like digestive issues, headaches, fatigue, and skin problems. Elimination diets remain the gold standard, but testing can expedite the identification process, especially with multiple sensitivities. Understanding your unique sensitivity profile allows for personalized dietary modifications that reduce inflammation and support overall health.

How the testing process typically works

The functional health testing journey follows a methodical process designed to uncover the root causes of your health concerns. Understanding what to expect makes the experience more empowering and less intimidating.

Initial consultation and test selection

You'll begin with a comprehensive consultation lasting 60-90 minutes. A functional medicine practitioner will thoroughly assess your medical history, current symptoms, lifestyle factors, and health goals to understand your unique situation. This detailed evaluation guides the recommendation of specific tests tailored to your individual needs rather than following a standardized approach.

At-home bloodwork, saliva testing, and sample collection

Following test selection, most functional tests can be completed at home using bloodspot, urine, saliva, breath, or stool samples. These kits arrive with clear instructions for proper collection. The non-invasive nature of saliva testing, for example, allows you to collect samples privately at optimal times. This convenience significantly increases compliance compared to conventional testing methods.

Lab analysis and biomarker interpretation

Once submitted, specialized laboratories analyze your samples using advanced techniques to measure various biomarkers, nutrient levels, hormone profiles, and microbial compositions. Your practitioner then interprets these findings within the context of your health history, identifying patterns and potential root causes.

Creating a personalized treatment plan

After analysis, your practitioner translates these findings into actionable insights during a follow-up consultation. Together, you'll develop a personalized plan that may include dietary modifications, targeted supplementation, lifestyle adjustments, and stress management techniques. This evidence-based approach addresses your specific imbalances rather than merely treating symptoms.

Benefits of functional medicine testing with Geviti

At Geviti, functional medicine testing becomes truly transformative through data-driven personalization. Unlike conventional approaches that offer generic solutions, Geviti's comprehensive testing creates the foundation for truly individualized health optimization that exceeds what traditional healthcare providers offer.

Personalized and targeted care

Geviti excels at translating complex biomarker data into actionable, personalized protocols designed specifically for your unique body. Their healthcare professionals craft plans grounded in your specific metrics and goals—whether you're exploring hormone therapy, peptide treatments, or refining dietary strategies. This targeted approach addresses your specific imbalances rather than applying standardized solutions that rarely deliver meaningful results.

What distinguishes Geviti is their expertise in cutting-edge treatments that most practitioners haven't yet incorporated. While conventional healthcare often employs a "wait and see" approach, Geviti's specialists immediately begin optimizing your biology based on your test results.

Tracking progress and adjusting plans

Health optimization depends on consistent monitoring, an area where Geviti truly excels. Their advanced technology platform integrates data from wearable devices, streams real-time metrics, and pairs everything with regularly scheduled testing. This ensures you receive timely feedback on what's working and what needs adjustment—something conventional healthcare cannot match.

Your treatment plan evolves as your body responds, creating an adaptive wellness journey based on data, not guesswork. With Geviti, you're never left wondering if your protocol is effective because the data shows exactly what's happening in your body month by month.

Empowering patients with data

Data access fundamentally transforms your role from passive recipient to active participant in your healthcare. With Geviti, you don't just receive numbers—you gain understanding through dedicated health coaches and clinicians who help interpret and adapt your care plan in real-time. This collaborative approach builds trust, accountability, and long-term success while giving you complete control over your health journey.

Unlike conventional healthcare where you might wait weeks for results with minimal explanation, Geviti provides comprehensive analysis with clear next steps. You'll understand exactly what each biomarker means and how it impacts your daily energy, sleep, performance, and longevity.

Preventing chronic disease before symptoms appear

This is where Geviti's approach becomes truly transformative. Annual comprehensive testing helps identify imbalances early, customize your wellness plan, and optimize your energy, digestion, hormones, and cognitive function before problems develop. This proactive approach can prevent or halt the progression of chronic conditions that would otherwise compromise decades of health and incur substantial medical expenses.

Geviti members consistently report improvements in energy, mental clarity, sleep quality, and physical performance within months of starting their personalized protocols.

Conclusion

Throughout this guide, we've seen how traditional healthcare typically takes a reactive approach—waiting until symptoms appear before conducting comprehensive testing. Consequently, many chronic conditions progress undetected for years, making treatment more challenging and less effective. Functional health testing offers a fundamentally different approach by identifying imbalances at the cellular level before they develop into diagnosable conditions.

Instead of relying on "normal" lab ranges based on statistical averages from predominantly unhealthy populations, functional testing evaluates your biomarkers against optimal health parameters. This approach provides a more comprehensive picture of your body's functioning and reveals subtle imbalances that standard testing would completely miss.

The wide range of functional tests available today—from hormone panels and gut health assessments to nutritional, genetic, and toxin screenings—enables truly personalized healthcare. These tests help doctors identify root causes rather than merely addressing symptoms, creating a foundation for targeted interventions that address your unique biochemistry.

Your health journey is distinctly your own. The biomarkers that indicate optimal function for you might differ significantly from someone else's based on your genetics, environmental exposures, and health history. Functional testing acknowledges this individuality and provides data-driven insights that empower you to take control of your health proactively.

The stakes could not be higher - with chronic disease affecting nearly 60% of American adults and driving 86% of healthcare costs, waiting until symptoms appear is simply not a viable strategy for those seeking long-term health and vitality.

This is exactly why Geviti exists. While traditional healthcare keeps you trapped in the "wait and get sick" model, Geviti empowers you to take control of your health through advanced functional testing, cutting-edge treatments, and personalized optimization protocols that actually work.

Geviti members don't just avoid disease - they achieve peak performance, enhanced longevity, and an optimized quality of life that most people never experience. With access to hormone optimization, peptide therapies, advanced supplementation, and continuous monitoring that adapts to your changing needs, Geviti represents the future of healthcare available today.

Don't wait for symptoms to force your hand. Join the thousands who have already discovered what it feels like to have truly optimized health. Explore Geviti's membership options and start your transformation today - because your future self will thank you for taking action now rather than waiting until it's too late.

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