Choosing a biological age test starts with deciding what you want “age” to mean. Some options estimate aging from DNA methylation, while others examine inherited genetic variants or measure broader health markers that may relate to aging. My leading pick for a direct biological-age estimate is TruAge Complete, which reports epigenetic age alongside aging pace and related traits. For a wider health picture, Hundred Health measures more than 100 biomarkers and adds physician review. PlexusDx is the broadest genetics-oriented option here, with more than 150 reports, while SelfDecode offers a simpler cheek-swab route and a focused set of recommendations.
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The tradeoff is that these tests do not all measure the same thing. A methylation-based result, a genetic risk report, and a conventional biomarker panel are not interchangeable, and none should be treated as a diagnosis or a definitive measure of how long someone will live. I ranked the options by how directly they address biological aging, how clear their collection and reporting details are, and how useful their results may be for different buyers.
Key Takeaways
- TruAge Complete is the closest match to a direct biological-age test in this lineup because it reports DNA methylation-based age and aging pace.
- Hundred Health measures current health markers, not a single epigenetic age score; its physician-reviewed, 100-plus-biomarker panel suits buyers seeking a broader clinical snapshot.
- PlexusDx and SelfDecode analyze inherited DNA variants, so their longevity insights describe genetic associations rather than a current biological-age measurement.
- Sample preference can narrow the choice: TruAge requires a fingertip blood spot, while SelfDecode uses a cheek swab and PlexusDx does not specify the sample type in the supplied product details.
- These results are best treated as context for wellness conversations, not as diagnoses, guarantees of future health, or proof that an intervention has changed someone’s aging rate.
| TruAge Complete Collection Epigenetic Age Test |  | Best Overall for a Direct Biological-Age Estimate | Test type: Epigenetic biological-age test using DNA methylation | Sample: At-home fingertip blood spot | Collection method: Blood spot card | VIEW LATEST PRICE | See Our Full Breakdown |
| Hundred Health Comprehensive Lab Test with 100+ Biomarkers |  | Best for a Broad, Physician-Reviewed Health Snapshot | Biomarkers: More than 100 | Coverage areas: Heart and metabolic health, hormones, inflammation, nutrients, stress, and aging | App features: Combines lab results, medical records, wearable data, and recommendations | VIEW LATEST PRICE | See Our Full Breakdown |
| PlexusDx Methylation and Longevity Genetic Test |  | Best for the Broadest Longevity Genetics Report | Reports: More than 150 DNA reports | Genetic variants analyzed: Over 200 million, as stated in the product details | Topics: Healthy aging, longevity markers, biological age, telomeres, and cognitive decline | VIEW LATEST PRICE | See Our Full Breakdown |
| SelfDecode Healthy Aging and Longevity DNA Test |  | Best for Beginners Who Prefer a Cheek Swab | Sample collection: At-home cheek swab | Sample processing: CLIA-certified lab | Analysis: AI analysis across 200 million genetic variants and peer-reviewed research, as stated | VIEW LATEST PRICE | See Our Full Breakdown |
| biological age test | Sample collection | Return shipping |
|---|---|---|
| TruAge Complete Collection Epi | — | — |
| Hundred Health Comprehensive L | — | — |
| PlexusDx Methylation and Longe | At-home sample; sample type is not specified in the supplied details | Prepaid return mailer included |
| SelfDecode Healthy Aging and L | At-home cheek swab | Prepaid mailer included |
More Details on Our Top Picks
TruAge Complete Collection Epigenetic Age Test
TruAge Complete is my top pick because its stated method and reports align most directly with what many buyers mean by a biological age test. It analyzes DNA methylation from a fingertip blood spot and reports biological age, telomere length, aging pace through Dunedin PACE, immune metrics, and other traits. That gives the buyer more than one aging-related output to interpret, rather than a single headline number with no context.
Its biggest distinction from PlexusDx and SelfDecode is the type of information. Those products examine inherited genetic variants associated with longevity; TruAge’s methylation approach is presented as an epigenetic age test. That does not make one result a definitive reading of health or future lifespan, but it makes TruAge the most straightforward fit when the primary question is how a test estimates biological aging rather than which inherited traits may be relevant to longevity.
The tradeoff is collection: a fingertip blood sample takes more effort than SelfDecode’s cheek swab, and some people would rather not collect blood at home. Results arrive two to three weeks after the lab receives the sample, so this is not an instant feedback tool. Compared with Hundred Health, TruAge focuses more explicitly on aging metrics, while Hundred’s strength is a much wider panel of current health biomarkers and physician review. I would choose TruAge for age-related measurements and Hundred for a broader lab-based health snapshot.
The stated privacy policy says the service is HIPAA compliant and does not share data with third parties. That can matter for people sending sensitive biological information, though privacy language should still be reviewed directly before purchase. I would treat the report as a wellness signal to discuss or compare over time, not as a diagnosis. A biological-age estimate is only as useful as the method, context, and follow-up behind it.
Pros:- Reports DNA methylation-based biological age and Dunedin PACE aging pace.
- Adds telomere length, immune metrics, and other trait reports for a broader aging-focused view.
- Uses an at-home fingertip blood spot rather than requiring a clinic visit.
- Lists a two-to-three-week result window after the sample reaches the lab and states that data are not shared with third parties.
Cons:- Fingertip blood collection may put off buyers who prefer a cheek swab.
- The two-to-three-week window begins after sample receipt, so shipping adds time.
- Multiple aging metrics can be difficult to interpret and should not be treated as a medical diagnosis.
Best for: Buyers who specifically want an at-home epigenetic test with biological-age and aging-pace reports, and who are comfortable collecting a fingertip blood spot.
Not ideal for: People who want a no-blood sample, immediate results, or a physician-led review of a broad clinical lab panel.
- Test type:Epigenetic biological-age test using DNA methylation
- Sample:At-home fingertip blood spot
- Collection method:Blood spot card
- Reported metrics:Biological age, telomere length, Dunedin PACE, immune metrics, and other traits
- Turnaround:Two to three weeks after sample receipt
- Privacy:States HIPAA compliance and no third-party data sharing
Our verdict“I rank TruAge first for buyers seeking a direct epigenetic biological-age estimate, provided they accept a blood spot and interpret the report as wellness information.”
Hundred Health Comprehensive Lab Test with 100+ Biomarkers
Hundred Health is the broadest health assessment in this group, but it is not the most direct biological-age test. Its 100-plus biomarkers cover heart and metabolic health, hormones, inflammation, nutrients, stress, and aging. Licensed physicians review the results, and the app can combine lab findings with medical records and wearable data. For someone trying to connect aging-related concerns with measurable health markers, that wider context may be more useful than a genetic report alone.
That breadth is also the main distinction from TruAge Complete. TruAge specifically reports methylation-based biological age and aging pace; Hundred Health’s supplied description does not list a standalone biological-age estimate or epigenetic analysis. I would not buy Hundred expecting one clear age score. I would choose it when the goal is a more extensive look at current biomarkers, with physician review and ongoing tracking as added support.
Compared with PlexusDx and SelfDecode, Hundred measures a different kind of evidence. The DNA tests describe inherited variants associated with longevity; a lab panel measures markers in a person’s current health snapshot. That can give a buyer more actionable topics to raise with a clinician, but a wide panel can also produce results that require medical context. Physician review is a meaningful differentiator, not a promise that every finding will answer a personal health question or replace care from someone familiar with the patient’s history.
The practical drawback is access. In-lab appointments are unavailable in the U.S. Virgin Islands, American Samoa, the Northern Mariana Islands, Guam, North Dakota, South Dakota, West Virginia, and Hawaii. Buyers should check appointment availability before choosing it. I also see the app’s combined data view as useful only for people willing to maintain health records and wearable information in one place. For a simple at-home age estimate, TruAge is a more focused choice; for a broader, clinically reviewed marker panel, Hundred is the better fit.
Pros:- Measures more than 100 biomarkers across several health areas, including markers related to aging.
- Results are reviewed by licensed physicians.
- App combines lab results with medical records, wearable data, and recommendations.
- Supports tracking health data and progress over time.
Cons:- The supplied details do not specify a standalone biological-age or DNA methylation score.
- In-lab appointments are unavailable in several states and U.S. territories.
- A broad panel may require clinician discussion to interpret findings in personal context.
Best for: People who want many current health biomarkers, licensed-physician review, and an app that brings lab results together with records and wearable data.
Not ideal for: Buyers seeking a clearly stated epigenetic age score, a simple DNA-only test, or an in-lab appointment in one of the listed unavailable locations.
- Biomarkers:More than 100
- Coverage areas:Heart and metabolic health, hormones, inflammation, nutrients, stress, and aging
- App features:Combines lab results, medical records, wearable data, and recommendations
- Tracking:Tracks health data and progress over time
- In-lab availability:Unavailable in the U.S. Virgin Islands, American Samoa, Northern Mariana Islands, Guam, North Dakota, South Dakota, West Virginia, and Hawaii
Our verdict“I recommend Hundred Health for a physician-reviewed, broad biomarker snapshot, not for buyers whose main goal is a dedicated epigenetic age score.”
PlexusDx Methylation and Longevity Genetic Test
PlexusDx is the breadth-first genetics option in this roundup. It offers more than 150 reports on healthy aging, longevity markers, and traits such as biological age, telomeres, and cognitive decline. The package also describes analysis across more than 200 million genetic variants, followed by personalized diet, supplement, and lifestyle recommendations. That range may appeal to someone who wants a wide set of wellness topics in one report rather than a narrowly focused age estimate.
The key distinction is that PlexusDx’s supplied description centers on genetic analysis and longevity insights, while TruAge specifies DNA methylation testing and reports biological age and Dunedin PACE. Buyers should not assume that a genetic report measures current biological aging in the same way as an epigenetic test. PlexusDx earns a spot for its breadth, but I rank it behind TruAge for the title’s central promise because its description gives less detail about how its biological-age report is calculated.
Compared with SelfDecode, PlexusDx offers a larger stated report collection, while SelfDecode provides a defined 50 recommendations and clearly identifies its cheek-swab sample. PlexusDx includes a prepaid return mailer, yet the supplied details do not identify the sample type or a results timeline. That missing collection information makes it harder to judge the experience before ordering. Someone who wants a simple, clearly described cheek swab may prefer SelfDecode; someone who values a larger menu of longevity reports may find PlexusDx more appealing.
Its personalized recommendations are a practical feature, but they should be read as wellness suggestions rather than guarantees of benefit. Genetic variants can be associated with traits without determining an individual’s outcome, and no report can substitute for medical evaluation. I would choose this test for a broad, genetics-led exploration of longevity, not for a definitive score of biological aging or a diagnosis. The uncertainty around sample type and turnaround keeps it below the more clearly specified options.
Pros:- Includes more than 150 reports across aging, longevity, telomeres, and other traits.
- Provides personalized diet, supplement, and lifestyle recommendations.
- Includes a prepaid return mailer for sending the sample back.
- Analyzes a broad set of genetic variants according to the product description.
Cons:- The supplied details do not specify the sample type or results turnaround time.
- Genetic associations do not predict an individual’s health outcomes with certainty.
- The method behind its biological-age-related report is less clearly described than TruAge’s methylation approach.
Best for: Buyers interested in a wide collection of inherited longevity and healthy-aging reports, plus personalized wellness recommendations.
Not ideal for: People who want a clearly specified epigenetic age method, a confirmed sample type, or a stated turnaround window before ordering.
- Reports:More than 150 DNA reports
- Genetic variants analyzed:Over 200 million, as stated in the product details
- Topics:Healthy aging, longevity markers, biological age, telomeres, and cognitive decline
- Recommendations:Personalized diet, supplement, and lifestyle guidance
- Sample collection:At-home sample; sample type is not specified in the supplied details
- Return shipping:Prepaid return mailer included
- Dimensions:6.63 x 4.5 x 0.88 inches
- Item weight:2.08 ounces
Our verdict“I would choose PlexusDx for a broad longevity genetics report, while selecting TruAge instead when a clearly described epigenetic age measurement is the priority.”
SelfDecode Healthy Aging and Longevity DNA Test
SelfDecode is the least intimidating collection option for buyers who would rather use a cheek swab than collect blood. The test examines genetic variants associated with longevity and healthy aging, then presents an online report with 50 recommendations. Its prepaid mailer and stated encrypted data handling, with deletion available, make the process easier to understand from the information provided than PlexusDx’s less clearly specified sample details.
It is not a direct substitute for TruAge Complete. TruAge reports DNA methylation-based biological age and aging pace; SelfDecode analyzes inherited variants linked to healthy aging. That makes SelfDecode more suited to exploring genetic context than measuring a current biological-age score. Compared with PlexusDx, it has fewer listed report outputs but a clearly described collection method and a defined number of recommendations. Buyers who prize breadth may prefer PlexusDx, while those who want a straightforward swab and focused online report may lean toward SelfDecode.
The product description says processing occurs at a CLIA-certified lab and that AI analysis draws on 200 million genetic variants and peer-reviewed research. Those details describe the lab and analysis process, but they do not make wellness findings diagnostic. The company states that its report is for educational and wellness purposes, not for diagnosing or treating disease. I would read recommendations as prompts for further research or discussion with a qualified professional, rather than as instructions to start supplements or change treatment.
SelfDecode’s biggest limitation for this roundup is the gap between longevity genetics and biological age measurement. It does not list a methylation age or an aging-pace score in the supplied details. Results are viewed online after mailing the swab, so this is not an immediate assessment, and buyers should be comfortable managing a digital report. For a blood-free introduction to genetic wellness reports, it is a sensible entry; for a direct age estimate, TruAge is a better match.
Pros:- Uses a cheek swab instead of a fingertip blood sample.
- Includes a prepaid return mailer.
- Provides an online report with 50 personalized recommendations.
- States that data are encrypted, privacy controls are HIPAA/GDPR-aligned, and users can delete their data.
Cons:- The described analysis concerns genetic variants, not a specified epigenetic age or aging-pace measurement.
- The report is for educational and wellness purposes, not diagnosis or treatment.
- Results require mailing the sample and viewing the report online.
Best for: First-time genetic-test buyers who want a cheek-swab collection, an online report, and personalized wellness recommendations.
Not ideal for: People seeking a methylation-based biological-age number, clinical diagnosis, or an in-person explanation of results.
- Sample collection:At-home cheek swab
- Sample processing:CLIA-certified lab
- Analysis:AI analysis across 200 million genetic variants and peer-reviewed research, as stated
- Report:Online report with 50 recommendations
- Return shipping:Prepaid mailer included
- Data privacy:Encrypted; HIPAA/GDPR-aligned; data can be deleted
- Intended use:Educational and wellness purposes only
Our verdict“I recommend SelfDecode as an approachable cheek-swab option for longevity genetics, but not as the strongest choice for a direct biological-age estimate.”
How We Picked
I ranked these four options by how well they answer the specific question behind a search for biological age tests: what is being measured, how closely that measurement reflects biological aging, and what a buyer can reasonably do with the report. A product that directly estimates age from epigenetic markers has a closer fit to this request than a genetic wellness test that reports inherited traits or a broad laboratory panel that measures present-day health markers.
Measurement method mattered most. TruAge analyzes DNA methylation and provides biological age and Dunedin PACE, making its stated outputs the most directly aligned with biological aging in this group. PlexusDx and SelfDecode analyze genetic variants associated with longevity and healthy aging. Those tests can offer context about inherited tendencies, but a genetic association is not the same as measuring how a person’s body is aging now. Hundred Health earns a place because its broad biomarker panel and physician review can give buyers useful health context, though its listed features do not specify a standalone epigenetic age score.
I also weighed collection burden, reporting clarity, and practical follow-up. The supplied details identify TruAge’s fingertip blood spot and turnaround window, and SelfDecode’s cheek swab and recommendation count. PlexusDx includes many reports and a prepaid mailer, but its sample type and turnaround are not specified in the information provided. Hundred Health adds app-based tracking and licensed-physician review, with an important geographic limitation on in-lab appointments. I did not treat a larger report count or more analyzed variants as proof of greater accuracy.
Finally, I considered whether each result could be mistaken for medical advice. Genetic and wellness reports have limits, and an age estimate can vary with the method and markers used. I favor clear expectations over sweeping claims: these options can support curiosity and health discussions, but buyers should not use them to diagnose disease, replace standard screening, or make treatment decisions without a qualified clinician.
| biological age test | Sample collection | Return shipping |
|---|---|---|
| TruAge Complete Collection Epi | — | — |
| Hundred Health Comprehensive L | — | — |
| PlexusDx Methylation and Longe | At-home sample; sample type is not specified in the supplied details | Prepaid return mailer included |
| SelfDecode Healthy Aging and L | At-home cheek swab | Prepaid mailer included |
Factors to Consider When Choosing Best Biological Age Tests
Before picking a kit, I would identify the kind of answer I want. Biological age is not one universal measurement: an epigenetic clock, an inherited genetic profile, and a panel of current lab markers answer different questions. The product name may sound similar across options, but method, sample, reporting, and follow-up are what separate a useful comparison from a misleading one.
Start with the measurement, not the headline
If I want a test that directly estimates biological age, I would look for a clear description of the method and the outputs. In this lineup, TruAge specifies DNA methylation and reports biological age and Dunedin PACE. Genetic tests such as PlexusDx and SelfDecode analyze variants associated with longevity; these can offer inherited context, but they do not necessarily show how a person is aging at the time of testing. Hundred Health measures many current biomarkers and can illuminate health areas connected to aging, but its supplied details do not specify a dedicated epigenetic age score.
I would not treat a larger number of reports or analyzed variants as proof that a test is more accurate. Ask what the test measures, what comparison group or reference is used if stated, and whether the result can be repeated under similar conditions. If the product description does not explain its age method, I would regard the result as a broad wellness feature rather than a precise personal benchmark.
Match sample collection to your comfort
Collection requirements can decide the shortlist. TruAge uses a fingertip blood spot, which may be acceptable to someone who wants an epigenetic assessment but can deter anyone uncomfortable with blood. SelfDecode uses a cheek swab and is the clearest blood-free choice in the supplied descriptions. PlexusDx says to collect a sample at home and return it in a prepaid mailer, but the provided information does not name the sample type. I would verify that detail before ordering if sample preference is a deciding factor.
Hundred Health is a lab test with in-lab availability restrictions. Its listed unavailable locations include the U.S. Virgin Islands, American Samoa, the Northern Mariana Islands, Guam, North Dakota, South Dakota, West Virginia, and Hawaii. Buyers should confirm local access and appointment options rather than assuming the service is available everywhere.
Decide how much interpretation you need
A report with many metrics can sound appealing, but more data can also mean more interpretation work. TruAge bundles several age-related measures, while PlexusDx and SelfDecode present genetics-oriented recommendations. Hundred Health’s physician review may appeal to people who prefer a professional review of a broad laboratory panel, though that review is not a replacement for care from a clinician who knows their history. Think about whether you want a self-guided digital report, a collection of wellness suggestions, or findings that can be discussed with a medical professional.
Recommendations should not be read as prescriptions. Genetic associations do not establish that a supplement, diet, or behavior will change an individual’s outcome. If a result prompts a health concern, I would bring it to a qualified clinician rather than using a consumer report to diagnose a condition or alter treatment.
Check timing, privacy, and repeat testing
Turnaround details are uneven across these options. TruAge lists two to three weeks after the sample reaches the lab, whereas PlexusDx and SelfDecode do not provide a specific timing in the supplied details. Shipping, sample quality, and processing can add time beyond any stated lab window. If a deadline matters, verify the current estimate directly before buying.
Biological and genetic data are sensitive. TruAge states that it is HIPAA compliant and does not share data with third parties; SelfDecode describes encryption, HIPAA/GDPR-aligned practices, and deletion controls. I would read each service’s current privacy terms to understand storage, research use, retention, and deletion. If I plan to compare results over time, I would also check whether the same method and reporting standard will be available later. A one-time result can satisfy curiosity, but repeat measurements are most informative when collection and analysis are comparable.
Set realistic expectations for what a result can say
No single consumer test can summarize a person’s health or lifespan. Biological-age estimates depend on the markers and statistical model used; genetic tests describe probabilities or associations, not a fixed future; and biomarker panels are snapshots that may shift with health and circumstances. A result that differs from calendar age is not, by itself, a diagnosis or a reason to panic.
I would use these kits as optional wellness information. They may help organize questions, provide a baseline, or suggest topics to discuss with a clinician, but they cannot replace standard screening or medical advice. For a decision about a specific symptom, condition, medication, or supplement, a qualified healthcare professional is a better source than a consumer test report.
Frequently Asked Questions
What is the difference between an epigenetic age test and a DNA longevity test?
An epigenetic age test analyzes markers such as DNA methylation and uses them to estimate aspects of biological aging. A DNA longevity test typically looks at inherited genetic variants associated with traits or health tendencies. In this comparison, TruAge describes methylation-based age and aging-pace reports, while PlexusDx and SelfDecode focus on genetic variants. Those outputs answer related but different questions, so I would not treat them as interchangeable.
Which option in this roundup is most directly aimed at biological age?
TruAge Complete is the most direct match based on the supplied product details because it explicitly describes an epigenetic test that reports biological age and Dunedin PACE. Hundred Health offers broad biomarkers related to aging, but its listed features do not specify a standalone biological-age score. PlexusDx and SelfDecode include longevity genetics, which can provide context but are not described as the same kind of methylation-based measurement.
Can a biological age test diagnose a health problem?
No. These products should not be used to diagnose disease, replace standard medical screening, or determine treatment. A reported age estimate or genetic association is only one piece of information and may not predict an individual’s health outcome. If a result raises a concern or conflicts with symptoms, I would discuss it with a qualified clinician who can consider the person’s history and other findings.
Which test is easiest if I do not want to collect blood?
SelfDecode is the clearest blood-free option in the supplied descriptions because it uses an at-home cheek swab. TruAge requires a fingertip blood spot. PlexusDx describes an at-home sample but does not specify the sample type in the provided details, so buyers who want to avoid blood should confirm its collection method before ordering. Hundred Health uses a lab-testing model rather than the same simple cheek-swab process.
Should I repeat a biological age test to track changes?
Repeating a test may help some buyers compare results, but only if the same method, sample process, and reporting approach are used and the result is interpreted cautiously. Biological-age estimates can vary, and a change does not automatically mean a meaningful change in health. I would check whether the provider supports repeat testing and discuss persistent or concerning results with a clinician rather than treating a single number as a scorecard.
Conclusion
My recommendation depends on the question you want answered. Choose TruAge Complete if your main goal is an epigenetic biological-age estimate with aging-pace and related metrics, and you are comfortable collecting a fingertip blood spot. Choose Hundred Health if you want a broad current-health picture, physician-reviewed results, and app-based tracking rather than a dedicated age score. Pick PlexusDx if a wide longevity genetics report and lifestyle recommendations matter more than a clearly specified methylation method. SelfDecode is the strongest fit for a beginner who wants a cheek-swab genetics test and an online report with recommendations.
Whichever route you choose, I would treat the report as wellness context, not a verdict on your health or future. Check the collection details, privacy terms, location access, and limits of interpretation before ordering. If the goal is to investigate a medical concern or make a treatment decision, involve a qualified clinician instead of relying on a consumer biological-age test alone.
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