Best At-Home Biological Age Tests in 2026: Compared and Reviewed

Five different technologies now claim to measure how fast you're ageing, and none of them agree with each other. That's not a flaw in the science; it's a sign the market has matured past a single "biological age" number toward distinct biological systems worth tracking separately. This comparison ranks the best biological age test in each category for 2026, based on current pricing, turnaround time, and how well each one actually holds up when something in your routine changes.

For the fuller picture on how biological age testing works and what each biomarker actually measures, read the complete guide: Biological Age Testing: The Complete Guide to Measuring How Fast You're Actually Aging.

State of the industry

Biological age testing has moved past the single-clock model that defined the category a few years ago. In 2026, "best biological age test" no longer has one answer, because the market now splits into distinct measurement families that each track a different biological process, not just a number. That distinction matters more than it did in 2023, when most buyers were choosing between a handful of near-identical saliva kits rather than weighing which biological system, immune, epigenetic, metabolic, actually matches what they're trying to change.

The IgG glycome, the basis of GlycanAge, looks at glycans attached to the IgG antibody, complex sugars that shift between pro- and anti-inflammatory states. Because these structures respond to a genuine intervention within 3 to 4 months for pharmaceutical or hormonal protocols, and 6 to 12 months for lifestyle changes, this family is the one most suited to tracking whether an intervention is actually working.

Epigenetic methylation clocks, descended from Horvath's original model, read DNA methylation patterns. Repeat measurements on the same person can vary by up to 10 years on these clocks, and the underlying signal moves slowly, which makes them better suited to a single baseline read than frequent retesting.

Gut microbiome and blood transcriptome testing looks at RNA activity and the trillions of bacteria in the digestive system, working from the theory that the gut-blood-brain axis drives much of how the body ages. Intracellular NAD+ testing measures a single energy-metabolism marker that declines with age.

A newer trend layers proteomics and metabolomics on top of these single-marker clocks. Few consumer kits do this comprehensively yet, and most of the market, including every test in this comparison, still reports one biological system at a time rather than a blended multi-omic score.

"Should we be looking at protein clocks, glycan clocks, or methylation clocks? I'm going to cop out and say more data are required. But it would be nice to see glycans, proteins, and methylation measured in a large cohort on the same individuals, so we can really look at whether there are additive contributions, which my guess is there will be, and which diseases the different omics platforms give us the best information on."

— Riccardo Marioni, Generation Scotland research group, University of Edinburgh

Best biological age test: 2026 comparison

Ranked: the best biological age tests in 2026

1. GlycanAge (best for tracking whether your interventions are working)

A finger-prick test, GlycanAge measures glycans on immunoglobulin G, the most abundant antibody in the blood, to calculate biological age from chronic inflammation levels. The balance between pro- and anti-inflammatory glycan structures determines both immune strength and overall biological age, and it is backed by decades of glycobiology research, built specifically to measure the efficacy of a lifestyle or pharmacological intervention rather than a single static reading.

Results take three to four weeks because multiple runs on each sample confirm accuracy, at 1 for £379, 2 for £682. You can book a one-to-one result interpretation call with a specialist to walk through what the numbers mean and where to focus next. The trade-off is turnaround: this is not the fastest kit on the list, but it is the one most capable of tracking a genuine intervention rather than only a single baseline read.

2. Index By Elysium (best for epigenetic clock loyalists)

Index by Elysium estimates biological age from DNA methylation, paired with an algorithmic platform and a scientific advisory board the company says includes eight Nobel Prize winners. Results reach an online Elysium Health account around six weeks after the sample is received, at $499 per kit.

Because methylation shifts slowly, Elysium is built for periodic baseline checks rather than close tracking, and retesting regularly at full price adds up quickly.

3. Viome Health Intelligence (best for gut-focused biohackers)

Viome's Health Intelligence kit profiles gene expression across microbes, mitochondria and human cells from a stool and blood sample, working from the premise that gut function drives broader health outcomes. Result times run around three to four weeks, at a standard price of $329.

Independent reviews have questioned how completely this approach captures overall health and flagged that the methodology behind some claims is not clinically proven. The kit is also tied closely to Viome's own supplement line, which is worth weighing against the price.

4. Muhdo DNA Health Test (best budget option)

Muhdo analyses saliva to track epigenetic and DNA-based lifestyle factors, testing a thousand genetic areas across 60 reports covering sleep, stress and diet. At £119.99, it is the most affordable test in this comparison and includes a personalised meal guide and workout planner. Results typically take two to three weeks, and a doctor consultation requires a paid upgrade.

5. Jinfiniti's Intracellular NAD Test (fastest results)

Jinfiniti measures intracellular NAD+ from a blood sample, with results back in as little as three to seven days, the quickest of any test here. NAD deficiency is tied to several hallmarks of ageing, and Jinfiniti has partnered with supplement brand Accuri to target what the results reveal. The catch is cost: recommended supplements run around £158 for 60mg, on top of the £145 test itself.

Actionability: data versus direction

A 2023-era biological age test typically ended at a static PDF: a number, a percentile, and little else. The 2026 market increasingly ships with something built to act on that number instead.

Every GlycanAge result is paired with a personal dashboard for tracking biological age over time, and a one-to-one call can be booked with a specialist to interpret what moved and why. For practitioners working with clients, an AI Interpretation Assistant can also cross-reference glycan indexes against uploaded biomarkers, genetics and wearable data, compare results across multiple testing points automatically, and surface which specific habits are most likely driving the trend, turning a report into a working intervention plan rather than a one-off snapshot.

"I'm a doctor who has transferred from prescribing pills to prescribing lifestyle, and for me that's really at the core of happy, healthy, long living. I measure biological age in all of my clients now, as a critical piece of data we should all be mapping to. Having accurate, personalized data is so important."

— Dr Alka Patel, GP and lifestyle medicine doctor

That shift, from a single static readout to a longitudinal, interpretable one, is increasingly what separates a test worth repeating from one worth taking once.

Verdict

GlycanAge is the strongest pick on this list for anyone whose main question is whether what they're doing is actually working. It responds to real interventions with far less measurement noise than epigenetic alternatives, it is backed by decades of glycobiology research, and every result comes with the option to book a one-to-one call rather than being left to interpret a report alone.

Index By Elysium and Muhdo suit a slower-moving baseline check, useful for a single, credible read rather than frequent retesting. Viome and Jinfiniti reward people chasing a specific mechanism, gut function or NAD levels, over a general biological age score, though both carry a heavier supplement upsell than the others on this list.

The right test ultimately depends on whether the goal is a single snapshot or a number that moves with what you actually do. For a one-time baseline, any of the five will do the job. For ongoing, evidence-based tracking of an active health protocol, GlycanAge remains the most direct route from result to next action.

Ready to see your own number? Order your GlycanAge test and get a personal biological age result within three to four weeks, with a one-to-one call included to walk through what it means and where to focus next.

External sources

• Westfield World Trade Center. Elysium [Internet]. Westfield; 2026 [cited 2026 Sep 24]. Link: https://westfield.com/westfieldworldtradecenter/store/Elysium/62879

• Trail and Kale. Viome Review, My Experience Of The Viome Health Intelligence Test [Internet]. Trail and Kale; 2026 [cited 2026 Sep 24]. Link: https://trailandkale.com/viome-review-gut-microbiome-testing/

• The Spoon. I Tried Viome's Health Intelligence Test To Understand My Gut Microbiome And Biological Age [Internet]. The Spoon; 2026 [cited 2026 Sep 24]. Link: https://thespoon.tech/i-tried-viomes-health-intelligence-test-to-understand-my-gut-microbiome-and-biological-age

• Holland and Barrett. Muhdo DNA Genetic Collection Kit [Internet]. Holland and Barrett; 2026 [cited 2026 Sep 24]. Link: https://www.hollandandbarrett.com/shop/product/muhdo-dna-genetic-collection-kit-60043540

• Muhdohub. Company reply to customer review [Internet]. Trustpilot; 2024 [cited 2026 Sep 24]. Link: https://ca.trustpilot.com/review/muhdohub.com

• Jinfiniti Precision Medicine. Intracellular NAD Test [Internet]. Jinfiniti; 2026 [cited 2026 Sep 24]. Link: https://www.jinfiniti.com/product/intracellular-nad-test/

• Resident. 6 Best Biological Age Tests and Epigenetic Testing Companies [Internet]. Resident; 2026 Aug 24 [cited 2026 Sep 24].
  Link: https://resident.com/health-and-wellness-resources/2026/08/24/6-best-biological-age-tests-and-epigenetic-testing-companies