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
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.