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Head-to-head buyer guide

Function Membership vs Levels Membership

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

By Ryan · Founder
Updated Jun 19, 2026

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Quick verdict

Function Membership (premium, $365/yr) vs Levels Membership (premium, $199/yr). Different tools for different jobs (see the per-product details below).

Compared on 1 shared spec · same category (ai software).

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
Levels CGM glucose monitoring app
Levels

Levels Membership

The CGM-as-a-service that turned blood sugar from a diabetic metric into a longevity metric.

PRICE
$199/yr
The verdict

We have not scored these two head to head, so this page does not name a winner. The Levels Membership starts at $199/yr and the Function Membership at $365/yr. The per-buyer recommendations below say who each one suits.

Side-by-side specs

SpecFunction MembershipLevels Membership
price$365/yr$199/yr
subscription$365/yr$199/yr

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

Levels Membership also publishes: hardware, features

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 Levels Membership if

Anyone wanting to understand their personal food/exercise/sleep response to glucose, or working on insulin sensitivity.

Skip if

You're prone to obsessing over normal variation, or you already have well-managed metabolic health and don't need data.

Go deeper

FULL REVIEW
Read the Function Membership review →
FULL REVIEW
Read the Levels Membership review →

Frequently asked

Which is better, the Function Membership or the Levels Membership?

We have not scored these two head to head, so this page does not name a winner. The Levels Membership starts at $199/yr and the Function Membership at $365/yr. The per-buyer recommendations below say who each one suits.

How much do they cost?

Function Membership: $365. Levels Membership: $199. 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. Levels Membership: Anyone wanting to understand their personal food/exercise/sleep response to glucose, or working on insulin sensitivity.

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