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Head-to-head buyer guide

Function Membership vs TruDiagnostic TruAge COMPLETE Epigenetic Test

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

By Ryan · Founder
Updated Jul 18, 2026

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Quick verdict

Function Membership (premium, $365/yr) vs TruDiagnostic TruAge COMPLETE Epigenetic Test (premium, $499 to $849/test). Different tools for different jobs (see the per-product details below).

Compared on 1 shared spec · cross-category comparison (ai software vs diagnostic).

Function Health membership - lab scans + biomarker visualization
Function Health

Function Membership

The platform that took the $5,000 executive physical and turned it into a $365/year membership - and made it better.

PRICE
$365/yr
TruDiagnostic TruAge Complete epigenetic age test kit
TruDiagnostic

TruAge COMPLETE Epigenetic Test

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

PRICE
$499 to $849/test
SCORE
8.6 / 10
View at TruDiagnostic →
The verdict

We have not scored these two head to head, so this page does not name a winner. The Function Membership starts at $365/yr and the TruDiagnostic TruAge COMPLETE Epigenetic Test at $499/test. The per-buyer recommendations below say who each one suits.

Side-by-side specs

SpecFunction MembershipTruDiagnostic TruAge COMPLETE Epigenetic Test
price$365/yr$499 to $849/test
subscription$365/yrSubscribe & Save marketed at ~$249 per test (quarterly retests, plan pricing); TruAge + TruHealth combo $849

Function Membership also publishes: biomarkers, frequency, clinician review, delivery

TruDiagnostic TruAge COMPLETE Epigenetic Test also publishes: service type, delivery model, clocks, single test, add on panels, sample type, turnaround, methodology, affiliate network

Who should buy which

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

Frequently asked

Which is better, the Function Membership or the TruDiagnostic TruAge COMPLETE Epigenetic Test?

We have not scored these two head to head, so this page does not name a winner. The Function Membership starts at $365/yr and the TruDiagnostic TruAge COMPLETE Epigenetic Test at $499/test. The per-buyer recommendations below say who each one suits.

How much do they cost?

Function Membership: $365. TruDiagnostic TruAge COMPLETE Epigenetic Test: $499 to $849. Prices are verified against the manufacturer; check the live links for current pricing.

Who should buy which one?

Function Membership: Anyone running peptides, optimizing hormones, on a longevity protocol, or just wanting twice-yearly comprehensive labs at a fixed price. TruDiagnostic TruAge COMPLETE Epigenetic Test: 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.

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