The Longevity Tests These Experts Actually Order

There is a longevity-test gold rush on. Podcasters order a hundred biomarkers, a clinic sells you a $599 gene panel, an influencer tells you to wear a glucose monitor you don't need. Strip away the supplement funnels and the biohacking theater and a much smaller list is left: maybe eight tests with real evidence behind them. Most of them are cheap, and most of them are already shoppable for cash in Austin.

We read across nine of the most-followed voices in longevity and metabolic health — Peter Attia, Andrew Huberman, Layne Norton, Matthew Walker, Tim Spector, Will Bulsiewicz, Josh Turknett, Mark Hyman, and Gary Brecka — and graded every test they push by the strength of the underlying clinical evidence, not by how loudly it's marketed. The commercial figures got vetted hardest. What follows is the honest list: what to buy, what to take with caveats, and what to skip.

An expert being excited about a test is not evidence. Some of the loudest recommendations in this space rest on a single study, an animal model, or a product the recommender happens to sell. So every test below carries a grade: Strong (validated, guideline-referenced), Moderate (reasonable, with real limits), Emerging (interesting science, unproven for healthy people), or Weak (don't bother). The grade reflects the clinical literature, not the enthusiasm.

VO2 max — the one they all rank first

If there is a consensus #1 test, this is it. VO2 max measures the peak rate your body can use oxygen during all-out effort, and low cardiorespiratory fitness carries a mortality risk that rivals smoking in the large cohort studies. Attia, Huberman, and Norton all put it near the top. The gold standard is a metabolic-cart test on a treadmill or bike with a mask — not a watch estimate. Austin performance labs sell it cash, and the catalog had no page for it until now.

ApoB and Lp(a) — better than a cholesterol panel

Attia and Hyman both push ApoB as the cardiovascular number that actually counts: it tallies the atherogenic particles a standard LDL reading can miss, and major lipid guidance now endorses it. Lp(a) is a once-in-a-lifetime genetic test — the 2026 ACC/AHA dyslipidemia guideline says measure it at least once in adulthood — because it's set by your genes and one in five people carries a hidden risk. Both are cheap cash labs, already shoppable in Austin through direct-to-consumer draw sites.

Coronary calcium score — your actual plaque, for ~$100

A CT calcium score (CAC) looks straight at calcified plaque in your coronary arteries. Attia uses it as a risk reclassifier and is honest about its limits — a zero score means less in a 40-year-old, and soft plaque can exist with no calcium, especially in younger women. Still, it's a well-validated, low-cost scan. A handful of Austin imaging centers run cash promotions around $75–$250.

DEXA — bone density and body composition

Norton and Attia both treat lean muscle mass and bone density as longevity insurance, and DEXA is the validated way to measure them. There are two different scans here: a clinical bone-density DEXA (the osteoporosis test, radiologist-read, roughly $125–$350) and a body-composition DXA at a fitness lab (fat and lean mass, often $45–$75). They run on the same machine but they are not the same product — don't let a $45 body-comp scan be sold to you as a diagnostic osteoporosis read.

Sleep apnea testing — Walker's non-negotiable

Matthew Walker's point is blunt: most sleep apnea is undiagnosed, and untreated apnea raises cardiovascular, metabolic, and cognitive risk. A home sleep apnea test performs comparably to an in-lab study for straightforward cases and is the accessible cash screen. (One caveat that gets lost in the noise: a wearable that scores your sleep is a trend tracker, not a diagnosis — and mouth-taping is not a test.)

HbA1c and fasting insulin — the cheap metabolic pair

HbA1c is the validated three-month blood-sugar average; fasting insulin can flag insulin resistance years before glucose moves. Turknett and Norton both anchor metabolic-health screening here. They cost almost nothing cash and are widely available — the kind of unglamorous test that beats most of the expensive panels for actual decision-making.

• hs-CRP (inflammation) — Moderate. A real, cheap cardiovascular adjunct, but non-specific: it rises with any infection, so one reading needs context.
• NMR LipoProfile / LDL particle number — Moderate, and largely redundant once you have ApoB. Don't pay for it as an essential extra.
• Resting metabolic rate (RMR) — Moderate. An accurate measurement of the calories you burn at rest; useful for a few people, but for most, an equation plus a scale is enough. Now shoppable in Austin from about $85.
• Gut microbiome / GI-MAP stool tests — Emerging at best for healthy people. The sequencing is real science, but there is no agreed definition of a 'healthy' microbiome and no validated reference ranges. A 2024 Lancet Gastroenterology consensus warned these direct-to-consumer tests lack proven clinical value. Shop the test if you're curious; treat the 'score' skeptically.
• Continuous glucose monitor (CGM) for non-diabetics — Emerging. Genuinely useful in diabetes and as a short educational tool; the case for ongoing use in metabolically healthy people is thin, and CGMs overestimate true blood glucose. Useful as biofeedback, not as a validated longevity test.

This is where the commercial end of the spectrum lives. Every item below is sold hard and supported weakly, and the major medical bodies have said so plainly.

• MTHFR / methylation gene panels — the flagship to skip. The American College of Medical Genetics and AAFP's Choosing Wisely both say routine MTHFR testing isn't clinically useful. It mostly exists to sell methylfolate supplements.
• IgG 'food sensitivity' panels — every major allergy society (AAAAI, ACAAI, EAACI) says these don't diagnose intolerance; IgG reflects exposure, not a problem. They drive needless restrictive diets.
• Hair tissue mineral analysis — the same sample sent to different labs comes back with different results. Not a reliable diagnostic.
• Provoked ('challenge') urine heavy-metal tests — chelators raise urinary metals in healthy people, manufacturing false positives that justify more treatment. Use validated blood testing if metals are a real concern.
• Intracellular micronutrient panels — ruled investigational by multiple insurers; no clear advantage over standard serum testing.
• The maximalist '100+ biomarkers as essential' bundle — built on real labs, but the all-at-once framing generates anxiety from borderline results and cross-sells supplements. Buy the handful of evidence-based markers instead.

1. 1
   Ask for the cash price by CPT code

   The blood markers (ApoB 82172, Lp(a) 83695, HbA1c 83036, hs-CRP) are commodity labs. Quote the code and you'll compare the same test across draw sites instead of marketing names.

2. 2
   Use direct-to-consumer labs for the bloodwork

   ApoB, Lp(a), NMR, hs-CRP, and HbA1c are all available cash through direct-pay lab vendors with local Austin draw sites — usually far below the billed-to-insurance rate, no doctor's order needed.

3. 3
   Shop the scans and fitness tests separately

   VO2 max, RMR, calcium score, DEXA, and a home sleep study each come from a different kind of provider (performance lab, imaging center, sleep lab). Independent centers routinely beat hospital pricing — get two quotes.

4. 4
   Skip the bundle if it hides the price

   A 'complete longevity panel' that won't itemize is usually marking up cheap labs. If a clinic won't give you a per-test cash number, that's information too.

³³Evidence grades (Strong / Moderate / Emerging / Weak) reflect our read of the clinical literature as of June 2026, deliberately more conservative than the on-air enthusiasm of any single expert. Experts are cited for the modalities they emphasize; this is a summary of their public positions, not their words. Prices are verified Austin-metro cash quotes and change — confirm the current number with the provider before you book. Informational only; discuss any test with your clinician.