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Head-to-head buyer guide

Function Health Function Membership vs InsideTracker Ultimate Plan

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
InsideTracker
InsideTracker

Ultimate Plan

The OG of "blood test + AI advice" — InsideTracker was doing this 10 years before Function Health existed.

PRICE
$199–$589/test
View at InsideTracker
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 MembershipInsideTracker Ultimate Plan
price$499/yr$199–$589/test
biomarkers110+48 (Ultimate)
frequency2x/yearSingle tests or annual
deliveryLab draw at Quest networkLab draw or home kit

Function Health Function Membership also publishes: clinicianReview, subscription

InsideTracker Ultimate Plan also publishes: dnaAddOn

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 InsideTracker Ultimate Plan if

Buyers who want test results paired with explicit "do X" recommendations rather than raw lab data they have to interpret.

Skip if

You want maximum biomarker coverage at the lowest annual cost — Function Health wins on that math.

Go deeper

FULL REVIEW
Read the Function Health Function Membership review →
FULL REVIEW
Read the InsideTracker Ultimate Plan review →