COMPARE · FUNCTION HEALTH + LIBBY

Function tests. Libby remembers.

Function Health runs a broad annual panel. Libby is the lifelong home your results live in — import your Function PDF and it joins one timeline with your Quest, LabCorp, and doctor's labs, ready for AI or a clinician.

Import your Function panel ›See the comparison

Libby is a companion to a testing membership, not a replacement for the blood draw.

DIFFERENT CATEGORIES · DIFFERENT JOBS

Two things that work better together.

Function is a genuinely useful testing service. The question its own users ask most is where do my results live long-term? — and that's the gap a record you own fills.

The testing membership

Function Health

Orders a broad annual panel — well over 100 biomarkers — with clinician review and a clean first read. It surfaces markers most people never get tested, like Lp(a) or ApoB. Built around this year's testing.

The record you own

Libby

Imports your Function PDF and every other lab, reconciles the units, and files each marker onto one lifelong timeline you own and can export. So a one-time panel becomes a history you can actually track — and hand to AI or a clinician.

SIDE BY SIDE

Function Health vs. a record you own.

Read this as “these do different things,” not “one wins.” Many people keep a testing membership and a personal record — the membership tests, the record remembers.

How Function Health and Libby compare, by role.
 Function HealthLibby (a record you own)
What it isA testing membershipA record you own
Core jobOrder a broad annual panel, review resultsConsolidate every lab onto one lifelong timeline
Draws your blood?YesNo — you bring results in
Your Function PDFLives in Function's appImported and read marker-by-marker onto your timeline
Other labs (Quest, LabCorp, your doctor)Not the focusAll in one place, units reconciled
TimelineThis membership's testingYour whole history, across providers and years
If you cancelAccess tied to membershipYou keep browsing and exporting your data
Works with AIWithin its own appShare or connect your record to ChatGPT or Claude
PriceTesting membership (billed by Function)$250/yr or $29/mo · 14-day free trial

Want the long version? Read our full guide: what to do with your Function Health results ›

ONCE YOUR PANEL IS BACK

Turn a one-time panel into a decade of signal.

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Get a copy out

Export your Function results as a PDF so you have them independent of the membership. Same for your Quest and LabCorp labs.

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Put them on a timeline

Drop the PDF into Libby. It reads every marker, reconciles the units, and files each onto one axis with your other labs.

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Ask better questions

With your history in a structured form, reason about your trend — hand it to ChatGPT or Claude, or bring a clean summary to a clinician.

QUESTIONS · FUNCTION + LIBBY

A few things worth knowing.

Is Libby an alternative to Function Health?
Not exactly — they do different jobs. Function is a testing membership that runs a broad annual panel. Libby is the record your results live in for life. Most people who search for a Function alternative actually want somewhere to keep and track their results over time, which complements a testing membership rather than replacing the blood draw.
Can I keep my Function Health results if I cancel?
Yes. Export your Function results as a PDF and import them into Libby, and they stay with you regardless of your membership status. Owning a copy is the point.
Can I combine my Function results with my Quest and LabCorp labs?
Yes. Libby consolidates results across providers onto one timeline, reconciling different units and marker names so your Function panel lines up next to your Quest, LabCorp, and doctor's labs.
Is Libby a testing service like Function?
No. Libby doesn't draw blood or sell panels. It's the record your labs live in — you bring results from Function, Quest, LabCorp, or your doctor, and Libby tracks them over the years and makes them usable with AI or a clinician.
START YOUR RECORD · LIVE TODAY

Got a Function panel? Give it a home for life.

Import your Function PDF and it joins one timeline you own — the first upload takes about a minute. Your first 14 days are free.

Start your record ›

14-day free trial · payment method required · own and export your data anytime. See pricing.