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Evidence Based Longevity (EBL)
Check what I take

Testing & Diagnostics

9 tests. Test before you supplement.

A supplement that improves the markers you never measured is indistinguishable from a placebo An inactive substitute made to look like the real treatment, so participants cannot tell which one they received.. The tests below cover three layers of longevity testing (comprehensive biomarker A measurable sign in the body, such as a blood test value, used to track a condition or the effect of a treatment. panels, biological-age clocks, and targeted at-home tests) described by what they actually measure, not what they market.

Last reviewed August 2026 · Next review November 2026

EBL testing guides

Two guides we wrote ourselves: the measurement standard we use to track whether an intervention worked, and a plain-English read on the wearable metric most people misread.

Measurement standard

The EBL Longevity Biological Test

The small, curated DNA-methylation panel we use at baseline and retest, led by DunedinPACE. Why three or four reliable markers beat a fifteen-clock report, and how to source it through TruDiagnostic.

Read the standard
Biomarker guide

HRV: what it actually measures

Your daily wearable reading is mostly noise. The 30 to 90 day trend is the signal. The human mortality evidence, age norms, and the interventions with real trial support.

Read the guide
Section 01

Biomarker panels.

Comprehensive blood panels. These differ in what they set out to do: InsideTracker pairs results with guided interpretation, Function Health reports the highest biomarker count of the three, and Marek and Direct Labs allow the panel to be assembled à la carte. EBL describes what each measures and makes no recommendation among them; which testing is appropriate for you is a question for your physician.

InsideTracker
Blood panel · guided interpretation
InsideTracker

InsideTracker Ultimate

43 blood biomarkers including ApoB Apolipoprotein B, a protein carried once on each cholesterol particle that can enter the artery wall, so it counts those particles directly., hsCRP High-sensitivity C-reactive protein, a blood marker of low-grade inflammation., ferritin, HbA1c A blood test that reflects average blood sugar over the previous two to three months., testosterone, DHEA-S, cortisol, Vitamin D, omega-3 index. The "InnerAge 2.0" algorithm converts the panel into personalized food, supplement, and exercise recommendations. Of the platforms here, the only one that returns a structured action plan rather than results alone.

Markers
43
Price
~$589 Ultimate
Sample
Venous draw (LabCorp / Quest)
Visit InsideTracker

Plain link. No tracking, no commission: EBL is paid nothing on this. Disclosure

Function Health
Blood panel · membership
Function Health

Function Health Membership

100+ biomarkers per panel, full lipid fractionation (LDL-P, sdLDL, ApoB), Lp(a) Lipoprotein(a), a cholesterol-carrying particle whose level is set largely by genetics. as standard, comprehensive thyroid, heavy metals, micronutrients, sex hormones, inflammatory markers. Includes physician review. Two complete panels per year on a $499 membership, the lowest cost per marker of the three panels listed here.

Markers
100+
Price
$499/yr · 2 panels
Sample
Venous draw + physician sign-off
Visit Function Health

Plain link. No tracking, no commission: EBL is paid nothing on this. Disclosure

Marek Health
Blood panel · à la carte
Marek Health · Direct Labs

Marek Health / Direct Labs

Physician-partner model. Any individual LabCorp or Quest test can be ordered à la carte. The lowest-cost route to a focused panel if you already know which markers you want. Specialty tests available: DUTCH hormone panel, GI-MAP, organic acids. Suited to repeat testers who do not need an interpretation layer.

Markers
À la carte
Price
ApoB ~$30 · Full panel $150–300
Sample
LabCorp / Quest draw
Visit Marek Health Lab bundles →

Plain link. No tracking, no commission: EBL is paid nothing on this. Disclosure

6 biomarkers worth tracking. Wherever you order them
  • ApoB, cardiovascular risk · target < 80 mg/dL
  • Lp(a), genetic CV risk · > 50 mg/dL needs management
  • hsCRP, systemic inflammation · < 1.0 mg/L
  • HbA1c + Fasting Insulin, metabolic reserve · < 5.4 / < 6 µIU/mL
  • 25-OH Vitamin D, immune, bone · no optimal range established
  • DHEA-S, adrenal output proxy · age-tier optimal
Section 02

Biological-age & cancer surveillance.

DNA-methylation tests. Biological-age clocks tell you the rate at which you're aging, most useful as a longitudinal track. GRAIL Galleri is a different category: multi-cancer early detection.

TruDiagnostic platform
Epigenetic · 4 clocks
TruDiagnostic

TruAge Complete

Reports four clocks together: Horvath, PhenoAge, GrimAge, and DunedinPACE An epigenetic test that estimates how fast a person is aging now, in years of biological aging per calendar year. clocks. Of those four, DunedinPACE is the only one that is intervention-responsive, what you actually need to track if you're trying to change your aging trajectory. Plus organ-system ages and estimated telomere length.

Clocks
4 · incl. DunedinPACE
Price
~$299 first · ~$250 repeat
Sample
At-home blood spot
Visit TruDiagnostic

EBL is paid a commission on tests ordered through this link. It changes no grade on this site. Disclosure

Elysium Index platform
Epigenetic · 19 organ systems
Elysium Health

Elysium Index

Biological ages across 19 distinct organ systems. Granular insight. See which systems are aging faster than others. Lacks DunedinPACE, so less useful for tracking how a 6-month intervention is changing your pace. Suited to a one-time detailed organ readout rather than a repeat-testing cadence.

Detail
19 organ systems
Price
~$499 · subscription
Sample
At-home blood spot
Visit Elysium Index

Plain link. No tracking, no commission: EBL is paid nothing on this. Disclosure

Galleri multi-cancer early detection test collection kit, by GRAIL
Different category · MCED
GRAIL

GRAIL Galleri

Not a biological-age clock, a multi-cancer early-detection (MCED) test. Uses cell-free DNA methylation to look for cancer signals from 50+ cancer types and predict tissue of origin. Requires physician ordering. The NHS-Galleri trial (142,000 adults aged 50 to 77, three annual screening rounds) did not meet its primary endpoint The one outcome a trial names in advance as its main test. Results on other outcomes carry less weight.: no statistically significant Unlikely to be explained by chance alone at the threshold the study set. It says nothing about whether the difference is large enough to matter. reduction in combined Stage III/IV cancers, incidence rate ratio 1.03 (95% CI 0.92 to 1.14, p = 0.63). In a pre-specified group of 12 cancers the sponsor reports Stage IV diagnoses down 22% and 26% in the second and third rounds, a four-fold higher detection rate alongside standard screening, and 16% more Stage I-II diagnoses. Reported February 2026 and presented at ASCO in May 2026. A U.S. premarket approval application is pending with the FDA. EBL publishes no evidence letter for any testing product and earns nothing here.

Detects
50+ cancer types
Price
~$949 · not insured
Sample
Physician-ordered draw
Request Galleri

Plain link. No tracking, no commission: EBL is paid nothing on this. EBL's founder holds an unpaid provider and affiliate account with GRAIL. Disclosure

Section 03

Targeted at-home tests.

Single-purpose, low-cost, finger-prick or strip, for tracking specific levers without ordering a full panel. A 90-day re-test cadence fits the time most markers take to move.

OmegaQuant
At-home · omega-3 + vitamin D
OmegaQuant

OmegaQuant Complete + D

Publishes the Omega-3 Index The share of EPA and DHA among the fatty acids in red blood cell membranes, reported as a percentage. methodology used across the omega-3 trial literature. Omega-3 Index Complete measures EPA+DHA as % of red-cell fatty acids (target > 8%). Vitamin D test for 25-OH-D in the same blood-spot kit. An at-home route to checking whether a supplement moved the marker.

Measures
Omega-3 idx + Vit D
Price
~$50–100 / test
Sample
At-home blood spot
Visit OmegaQuant

Plain link. No tracking, no commission: EBL is paid nothing on this. Disclosure

Berkeley Life
At-home · salivary nitrite
Berkeley Life

Nitric Oxide Test Strips

Salivary-nitrite strips, color-changes in 15 seconds to estimate NO bioavailability The share of a dose that reaches the bloodstream in a form the body can use.. NO production drops sharply after 40 and is a meaningful vascular-aging marker. Cheap, fast, repeatable. Not a substitute for a full panel, but useful for tracking the effect of beetroot/L-arginine/L-citrulline interventions.

Measures
Salivary nitrite
Price
~$20–30 / 50 strips
Sample
Saliva strip · 15s
Visit Berkeley Life

Plain link. No tracking, no commission: EBL is paid nothing on this. Disclosure

Everlywell
At-home · broad panel
Everlywell

Everlywell 360 Full Panel

Broad at-home panel covering cardiovascular, metabolic, thyroid, hormones, vitamins, inflammation. Lighter clinical depth than Function Health but no membership commitment. Good starting point for first-time testers to identify which systems to investigate further.

Markers
28 thresholds across 7 systems
Price
~$250–400 one-time
Sample
At-home blood spot + urine
Visit Everlywell

Plain link. No tracking, no commission: EBL is paid nothing on this. Disclosure

Where this connects in the EBL method

Testing is step 3. The retest is step 5.

Step 1
Medication and Supplement Check

Medications, supplements and their depletions, read before any lab is ordered.
Terminal 04
Biomarker Tracker

Guideline ranges against evidence-informed reference targets, each labeled by what it is, plus retest cadence.
Terminal 06 · Member
Medication and Lab Monitor

Layer tests → interventions → retest → physician discussion sheet.

EBL is paid a commission on one test listed above, TruDiagnostic. Every other link on this page pays EBL nothing. All nine are ungraded. Read the disclosure.