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Functional laboratory education

The Longevity Lab Edit

Healthy aging begins with the things you can practice: strength, movement, nourishing food, sleep, and connection. Testing is useful when it sharpens a decision about those foundations or identifies a treatable risk.

By Dr. Michele Burklund, NMD · Updated November 1, 2026

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Begin with the foundations

A question before a panel.

Begin with the question, then choose the test. Food, sleep, movement, connection, oral care, and relevant environmental changes remain the foundation. Laboratory work is most useful when a finding could change a decision.

01 / METABOLIC & INFLAMMATORY PATTERNS

Metabolic & Inflammatory Patterns

Discuss lipids, glucose assessment, blood pressure, and relevant family history. These offer actionable context beyond any single wellness score.

02 / CELLULAR NOURISHMENT

Cellular Nourishment

Individualized blood work may investigate nutritional status, blood counts, and kidney or liver function. Select tests to address a question rather than maximize the number of biomarkers.

03 / THE GUT ECOSYSTEM

The Gut Ecosystem

Stool profiling may add context when digestive symptoms warrant investigation. Diet, stool consistency, medications, and recent antimicrobial use all affect the result. A microbiome score is not a universal target for healthy aging.

04 / GENETICS & BIOLOGICAL AGE

Genetics & Biological Age

Genetic profiles describe inherited probabilities; epigenetic tests estimate aging-related patterns. Neither predicts an individual lifespan or makes future disease inevitable. Review genetic findings in the context of ancestry, family history, and clinical evidence.

The tests in this collection.

3X4 Genetics

3X4 Genetics Test + Blueprint Report

What it measures
Inherited genetic variants used to describe selected nutritional, metabolic, and lifestyle-related pathways.
Why it is here · When it may be useful
A person wants to discuss inherited tendencies in nutrition and lifestyle with a clinician familiar with genetic interpretation.
What ordering involves
Buccal swab collected with the at-home kit. Follow the instructions supplied with the exact order. Fasting and medication timing may change when tests are combined.
Keep in mind
Inherited risk is probabilistic. Performance varies by condition and the ancestry of the populations used to develop the model; a risk score does not establish disease.
Test information & references

Quest Diagnostics

Hemoglobin A1c

What it measures
Glycated hemoglobin, reflecting average blood glucose over approximately two to three months.
Why it is here · When it may be useful
Longer-term glucose trends would inform metabolic care.
What ordering involves
Whole blood from a blood draw. A1c alone does not require fasting; other tests in the same order may.
Keep in mind
Anemia, hemoglobin variants, recent blood loss or transfusion, and altered red-cell turnover can affect interpretation. It does not reveal individual meal-related glucose peaks.
Test information & references

Quest Diagnostics

hs-CRP

What it measures
Low concentrations of C-reactive protein using a high-sensitivity assay.
Why it is here · When it may be useful
Cardiovascular risk assessment would benefit from an additional inflammation marker when acute illness is absent.
What ordering involves
Serum from a blood draw. Follow the instructions supplied with the exact order. Fasting and medication timing may change when tests are combined.
Keep in mind
Inflammatory results are nonspecific and may change after recent illness or injury. They do not identify the source of inflammation or measure emotional grief. These two high-sensitivity CRP listings are alternatives, not a reason to order duplicate measurements.
Test information & references

Quest Diagnostics

Cardio IQ hs-CRP

What it measures
Low concentrations of C-reactive protein using a high-sensitivity assay; a separate ordering option within the Cardio IQ range.
Why it is here · When it may be useful
Cardiovascular risk assessment calls for high-sensitivity CRP; choose this or the other hs-CRP option rather than ordering both routinely.
What ordering involves
Serum from a blood draw. Follow the instructions supplied with the exact order. Fasting and medication timing may change when tests are combined.
Keep in mind
Inflammatory results are nonspecific and may change after recent illness or injury. They do not identify the source of inflammation or measure emotional grief. These two high-sensitivity CRP listings are alternatives, not a reason to order duplicate measurements.
Test information & references

Quest Diagnostics

Micronutrient, Coenzyme Q10 (CoQ10)

What it measures
Circulating coenzyme Q10, a compound involved in energy metabolism and antioxidant activity.
Why it is here · When it may be useful
A targeted nutritional question makes a circulating CoQ10 measurement relevant.
What ordering involves
Serum from a blood draw. Follow the instructions supplied with the exact order. Fasting and medication timing may change when tests are combined.
Keep in mind
Circulating CoQ10 is affected by supplementation and lipoproteins. It is not a direct measure of whole-body mitochondrial performance.
Test information & references

SpectraCell

Micronutrient Test

What it measures
The response of living white blood cells to different nutrient conditions in a laboratory assay.
Why it is here · When it may be useful
A clinician is exploring a nutritional question and can relate the assay to intake, symptoms, and established nutrient testing.
What ordering involves
Whole blood collected by a phlebotomist using the supplied kit. Follow the selected laboratory collection and shipping schedule; SpectraCell currently says no fasting is needed for its individual Micronutrient Test.
Keep in mind
An ex-vivo cell-response assay is different from a serum nutrient concentration. Use alongside diet, symptoms, and established tests rather than assuming every flagged result requires high-dose supplementation.
Test information & references

Boston Heart Diagnostics

Polygenic Risk Map - Female Complete

What it measures
Combinations of inherited variants used to estimate susceptibility to selected conditions.
Why it is here · When it may be useful
A genetics-informed prevention conversation includes family history, current biomarkers, the limitations of risk scores, and privacy considerations.
What ordering involves
Saliva collected with the at-home kit. Follow the instructions supplied with the exact order. Fasting and medication timing may change when tests are combined.
Keep in mind
Risk estimates are probabilistic, not diagnoses. The current listing describes comparison with a European reference dataset, so applicability across ancestries needs particular care.
Test information & references

Jona

Jona Clinical Gut Microbiome Analysis Advanced

What it measures
Microbial DNA from shotgun metagenomic sequencing together with selected stool chemistry markers.
Why it is here · When it may be useful
Persistent digestive concerns warrant a discussion about whether microbial and stool-chemistry information would change care.
What ordering involves
Stool collected with the at-home kit. Follow the selected laboratory instructions for collection days, sample handling, and recent antimicrobial or supplement use.
Keep in mind
A stool result is a snapshot. Microbial associations do not prove a cause of symptoms or establish one ideal microbiome; individual markers differ in clinical validation.
Test information & references

TruDiagnostic

TruAge + TruHealth

What it measures
DNA-methylation-based estimates of biological aging and related health patterns.
Why it is here · When it may be useful
An informed longevity discussion includes exploratory aging estimates alongside established metabolic markers and physical function.
What ordering involves
Bloodspot collected with the at-home kit. The current storefront marks this test as requiring fasting. Follow the exact order instructions for duration and other preparation; discuss medication timing with the ordering clinician.
Keep in mind
Methylation-derived estimates are not direct measurements of serum nutrients or hormones, a disease diagnosis, or proof of lifespan extension.
Test information & references

A closer look

What the findings can tell us.

Collect with intention.

Blood sampling and fasting requirements depend on the selected assay. Biological-age tests have their own collection instructions and may advise waiting after acute illness.

Keep the limits in view.

Epigenetic estimates of nutrients, hormones, or metabolic markers are not interchangeable with directly measured blood concentrations.

Results belong within your history, symptoms, examination, medications, and the laboratory's method. A reference interval is not a universal target for every person. There is no single validated set of 'optimal' values that applies across all assays and life stages.

Availability, ordering requirements, collection fees, and eligibility vary by test and location. Review the current Fullscript listing and your clinician's instructions before purchasing.

VIEW THE LAB COLLECTION ON FULLSCRIPT

Good questions. Thoughtful answers.

Do I need every test in this guide?

No. Choose a test only when its result may change a useful decision, taking existing results, symptoms and your budget into account.

Does an out-of-range result identify the root cause?

Not by itself. Interpretation depends on the assay, collection, history and the pattern across findings. A result can be one clue without being the explanation.

Where can I see ordering requirements?

Open the individual Fullscript listing for current availability, specimen instructions and eligibility. A collection may include alternatives rather than tests intended to be purchased together.

Related reading.

Research & references

Educational information, not an individualized order or interpretation. Purchases through my storefront may financially support my practice.

The Foundations · My gift to you

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your body knows.

Before protocols. Before supplements. Begin with water, nourishment, breath, and the everyday environment that supports your health.

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