Function Health Function Membership vs MyProtocolStack Optimizer

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

By Ryan · Editor & Founder

Published May 3, 2026

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

MyProtocolStack

The software platform that finally gave peptide and longevity protocols proper instrumentation.

PRICE

$39/mo

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.

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 MyProtocolStack Optimizer if

Anyone running 2+ peptide protocols, tracking biomarkers across cycles, or wanting protocol-aware AI coaching.

Skip if

You only run a single simple protocol and prefer paper logs, or you don't track biomarkers.