Longevity testing refers to a set of diagnostic tools designed to measure biological aging rather than chronological age. These tests analyze biomarkers such as blood markers, metabolic indicators, genetic data, and epigenetic changes to estimate how quickly a person’s body is aging. Unlike traditional medical tests that focus on diagnosing disease, longevity testing aims to identify early indicators of aging-related risk. By analyzing these biomarkers, individuals can understand how lifestyle, diet, and environmental factors influence their aging trajectory. Longevity testing is increasingly used in preventive health strategies because it provides measurable insights into metabolic health, inflammation, and cellular aging processes.
Quick Summary
- Best overall longevity testing service: InsideTracker
- Best for deep biological data: Function Health
- Best at-home metabolic testing: Levels
- Best epigenetic aging test: TruAge
- Best microbiome analysis: Viome
- Best no-blood cheek-swab test: Tally Health (CheekAge)
Why Longevity Testing Matters
Chronological age does not always reflect biological health. Two people of the same chronological age can have dramatically different biological aging profiles, shaped by genetics and lifestyle factors.
Biomarkers play a key role in understanding aging. Biological aging markers such as DNA methylation patterns and metabolic indicators are associated with disease risk, a growing body of aging research shows.
Early detection of metabolic and inflammatory markers allows individuals to make lifestyle adjustments before diseases develop. Many chronic diseases linked to aging develop silently for years before symptoms appear, a well-documented pattern in public health research.
Longevity testing aims to identify those early signals and provide actionable insights for improving long-term health.
Comparison Table
| Service | Price | What It Tests | Turnaround | Our Rating |
|---|---|---|---|---|
| InsideTracker | ~$149–$499 | Blood biomarkers | 7–10 days | 9.3 |
| Function Health | ~$499/year | 100+ biomarkers | 10–14 days | 9.1 |
| Levels | ~$199/year | Continuous glucose monitoring | Real time | 8.8 |
| TruAge | ~$299 | Epigenetic age | 4–6 weeks | 8.6 |
| Viome | ~$249 | Microbiome and RNA | 3–4 weeks | 8.4 |
| Tally Health | ~$249 test | Epigenetic (cheek swab) | 4–6 weeks | 8.2 |
Ranked Reviews
1. InsideTracker
Score: 9.3 / 10
InsideTracker is one of the most widely used longevity testing platforms and focuses on blood biomarker analysis. The service analyzes markers related to metabolism, inflammation, hormone balance, and cardiovascular health.
Blood biomarkers such as cholesterol levels, inflammatory markers, and glucose regulation are associated with aging outcomes, according to biomarker research.
InsideTracker provides personalized recommendations based on the test results, including dietary adjustments, supplement guidance, and lifestyle changes.
Pros
- Extensive biomarker analysis
- Personalized recommendations
- Strong research foundation
Cons
- Requires blood sample
- Higher pricing for advanced panels
2. Function Health
Score: 9.1 / 10
Function Health offers one of the most comprehensive health testing platforms available. The service measures more than 100 biomarkers including metabolic markers, hormones, and inflammation indicators.
Monitoring metabolic biomarkers such as cholesterol and blood sugar plays a key role in preventing chronic disease, per cardiology and public-health guidance.
Function Health aims to make advanced lab testing accessible without requiring physician referrals.
Pros
- Extremely comprehensive testing
- Preventive health focus
- Clear lab reports
Cons
- Higher annual cost
- Requires blood draw
3. Levels
Score: 8.8 / 10
Levels focuses on metabolic health through continuous glucose monitoring technology. Users wear a sensor that tracks blood glucose levels throughout the day.
A 2020 Journal of Clinical Endocrinology & Metabolism editorial by Battelino and Dovč found that glycemic variability is linked to a higher risk of major cardiovascular events and mortality in people with diabetes.
Levels provides detailed insights into how food, sleep, and exercise affect glucose levels.
Pros
- Real-time metabolic data
- Strong mobile platform
- Actionable insights
Cons
- Focused mainly on glucose
- Requires wearable sensor
4. TruAge
Score: 8.6 / 10
TruAge uses epigenetic testing to estimate biological age based on DNA methylation patterns.
A 2018 Nature Reviews Genetics review by Horvath and Raj found that DNA methylation-based clocks are among the most robust predictors of biological aging.
These tests provide insight into whether lifestyle interventions may be slowing or accelerating aging.
Pros
- Measures biological age directly
- Cutting-edge aging science
- Easy at-home testing
Cons
- Limited actionable guidance
- Higher cost
5. Viome
Score: 8.4 / 10
Viome analyzes the gut microbiome and gene expression patterns to provide personalized health recommendations.
The gut microbiome plays a significant role in metabolic health and immune regulation, a well-established finding in microbiome research.
Viome’s approach combines microbiome testing with nutrition recommendations tailored to individual biology.
Pros
- Microbiome insights
- Personalized nutrition guidance
- Non-invasive testing
Cons
- Complex reports
- Not focused solely on aging
6. Tally Health
Score: 8.2 / 10
Tally Health takes a different route to longevity data: instead of blood, its CheekAge test estimates biological age from DNA methylation in a painless cheek swab, with results in about 4–6 weeks. Co-founded by Harvard geneticist Dr. David Sinclair, its clock is described in peer-reviewed research.
A one-time TallyAge Test runs $249, or a membership from $129/mo adds twice-yearly retests, a daily supplement, and an action plan (verified 2026-07-17). Tally reports that “over 62% of members lowered their epigenetic age by an average of 2+ years within 12 months,” a company-stated figure we could not independently verify, so treat it as a claim, not a proven outcome.
Pros
- No blood draw, cheek swab only
- Named scientist and published clock
- Membership retests track change over time
Cons
- Headline efficacy stat is company-reported
- Membership pricier than one-time tests
How Do I Actually Order These Longevity Markers?
These services estimate biological age, but longevity clinicians act on specific blood markers, ApoB (cardiovascular risk), hs-CRP (inflammation), and HbA1c (metabolic health). You can order those yourself without a doctor’s visit. We compared the cheapest direct-to-consumer lab route against the physician-order-included option here: Order your own longevity bloodwork →.
How We Rank
1. Research quality. We evaluate the scientific rigor behind each service’s testing methodology.
2. Data depth and biomarker coverage. More comprehensive biomarker panels receive higher scores for longevity relevance.
3. Ease of use. We consider how accessible testing is for people without clinical backgrounds.
4. Real-world actionability. Services that translate results into clear, practical health guidance score highest.
Frequently Asked Questions
What is biological age?
Biological age measures how well the body is functioning relative to typical aging patterns. Biological age can differ significantly from chronological age, the foundational premise behind biological-age testing.
Are longevity tests accurate?
Longevity tests estimate aging markers using biological indicators such as DNA methylation and metabolic biomarkers. Accuracy varies by test type and the quality of laboratory analysis used.
Can longevity testing predict lifespan?
Longevity tests cannot predict exact lifespan but may indicate health risks associated with aging. They are best used as a tool for tracking biological changes over time rather than as predictive diagnostics.
How often should longevity testing be done?
Many experts recommend testing every 6 to 12 months to track changes and measure the impact of lifestyle interventions.
Are at-home longevity tests reliable?
Many at-home tests use laboratory analysis, which can provide useful insights when interpreted correctly. Results should be reviewed alongside a healthcare provider for full context.
What is the most common longevity biomarker?
DNA methylation patterns are among the most widely studied biological aging markers, forming the basis of epigenetic clocks used by services like TruAge.
Sources
- National Institute on Aging
- Nature Aging
- Aging Cell Journal
- American Heart Association
- Journal of Clinical Endocrinology and Metabolism
Our top pick is InsideTracker because it provides the most actionable longevity insights based on well-established biomarker science.
Last updated: March 2026. Service details and pricing are based on publicly available information and are subject to change. This page does not constitute medical advice. Consult a licensed healthcare provider before making decisions based on any longevity test results.
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