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Independent·Affiliate-disclosed·Spec-verified·Updated June 17, 2026
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Head-to-head buyer guide

Function Health Function Membership vs Marek Health Guided Optimization Membership

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

By Ryan · Founder
Published May 3, 2026
Quick verdict

Function Health Function Membership (premium, $499/yr) vs Marek Health Guided Optimization Membership (premium, $99–$399/mo) - 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 $499/year membership - and made it better.

PRICE
$499/yr
View at Function Health
Marek Health comprehensive hormone optimization dashboard
Marek Health

Guided Optimization Membership

The premium guided-protocol HRT platform where the YouTube longevity crowd actually gets their bloodwork done - broader, deeper, and more clinically aggressive than Hone.

PRICE
$99–$399/mo
SCORE
8.9 / 10
View at Marek Health
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 MembershipMarek Health Guided Optimization Membership
price$499/yr$99–$399/mo
biomarkers110+80+ markers in comprehensive panels

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

Marek Health Guided Optimization Membership also publishes: serviceType, deliveryModel, membership, initialPanel, medications, consultModel, audience, monitoringCadence

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 Marek Health Guided Optimization Membership if

Experienced TRT/HRT users running multi-medication protocols, biomarker-literate buyers who want clinically aggressive guidance, and the intersection of "performance optimization" and "wants real bloodwork supervision."

Skip if

You're TRT-curious for the first time (start with Hone), you can't budget $300+/mo all-in, or you want a higher-touch in-clinic experience (Defy Medical or Cenegenics).

Go deeper

FULL REVIEW
Read the Function Health Function Membership review →
FULL REVIEW
Read the Marek Health Guided Optimization Membership review →