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Head-to-head buyer guide

Function Health Function Membership vs TruDiagnostic TruAge COMPLETE Epigenetic Test

Specs, prices, editor verdict, and who should buy which — compared side-by-side.

By Ryan · Editor & Founder
Published May 3, 2026
Function Health membership dashboard
Function Health

Function Membership

The platform that took the $5,000 executive physical and turned it into a $499/year membership — and made it better.

PRICE
$499/yr
View at Function Health
TruDiagnostic TruAge epigenetic age test kit
TruDiagnostic

TruAge COMPLETE Epigenetic Test

The biological-age epigenetic test the longevity crowd actually uses — and the only consumer-accessible kit running multiple validated clocks (DunedinPACE, Horvath, OMICmAge) in one panel.

PRICE
$229–$499/test
SCORE
8.6 / 10
View at TruDiagnostic
The verdict

These are close picks. Both score in the same range. The right call depends on buyer profile — read the per-buyer recommendations below.

Side-by-side specs

SpecFunction Health Function MembershipTruDiagnostic TruAge COMPLETE Epigenetic Test
price$499/yr$229–$499/test
subscription$499/yr$499-799/yr (quarterly retests)

Function Health Function Membership also publishes: biomarkers, frequency, clinicianReview, delivery

TruDiagnostic TruAge COMPLETE Epigenetic Test also publishes: serviceType, deliveryModel, clocks, singleTest, addOnPanels, sampleType, turnaround, methodology, affiliateNetwork

Who should buy which

Pick the Function Health Function Membership if

Anyone running peptides, optimizing hormones, on a longevity protocol, or just wanting twice-yearly comprehensive labs at a fixed price.

Skip if

You already get comprehensive labs through your concierge clinic, or you only want the cheapest single-panel test (go InsideTracker).

Pick the TruDiagnostic TruAge COMPLETE Epigenetic Test if

Longevity-focused buyers running serious anti-aging protocols who want validated pace-of-aging tracking, and biomarker-literate users adding epigenetic data to a broader monitoring stack.

Skip if

You want actionable health recommendations (Function Health or InsideTracker beat it on that), you won't commit to longitudinal retests (single-point readings are noisy), or you're shopping for vanity rather than research-grade data.

Go deeper

FULL REVIEW
Read the Function Health Function Membership review →
FULL REVIEW
Read the TruDiagnostic TruAge COMPLETE Epigenetic Test review →