Honest comparison

Why not just use Function Health?

Function Health gives you a lot of lab data and a protocol built from it. ProtocolEngine gives you an evidence-graded protocol before any test, in the EU too.

Choose Function Health if

You live in one of the 48 US states it serves, want 160+ lab tests a year with clinician review, and are happy to start with a blood draw. For breadth of lab data at this price, Function is hard to beat.

Choose ProtocolEngine if

You want a protocol today without a blood draw, you live in Germany or elsewhere in the EU, or you want to see the evidence grade and papers behind each recommendation.

Function Health and ProtocolEngine, side by side

Orders lab tests for youFunction Health is ahead
Function Health
Yes: Yes. 160+ lab tests a year across two blood draws.
ProtocolEngine
No: No. Upload results from any lab you already use.
Clinician review or prescriptionsFunction Health is ahead
Function Health
Yes: Yes. Clinicians review your results and flag urgent findings.
ProtocolEngine
No: No. ProtocolEngine provides information, not medical care.
Personal plan from your goals and routines
Function Health
Yes: Yes. A protocol with food and supplement guides, built from your results.
ProtocolEngine
Yes: A two-minute quiz builds a daily protocol around your goals, schedule and what you already take.
Get a plan without buying a test first
Function Health
No: No. The protocol starts from your blood results.
ProtocolEngine
Yes: Yes. The quiz builds your protocol right away. Lab results add detail when you have them.
Evidence grade on each recommendation, linked to the papers
Function Health
Not shown per recommendation on its public pages. We could not review the logged-in product.
ProtocolEngine
Yes: Each graded supplement, habit and diet item shows its grade from S to E. Click it to see each paper and how it scored.
Habits, diet and supplements in one plan
Function Health
Partly: Partly. Food and supplement guides, plus lifestyle advice.
ProtocolEngine
Yes: All three are graded on the same scale and combined in one protocol.
Uses wearable data
Function Health
Yes: Yes, through connected apps.
ProtocolEngine
Yes: Connects Oura and Withings.
Available in Germany and the EU, in German and French
Function Health
No: No. Labs in 48 US states; we found no offer outside the US. English only.
ProtocolEngine
Yes: Yes. Available in English, German and French. Account data is stored in the EU.
Price
Function Health
$365 a year (first-year price; renewal price not published). Add-on tests extra.
ProtocolEngine
Free to browse and to take the quiz. Premium: $12/mo or $99/yr

What you get	Function Health	ProtocolEngine
Orders lab tests for youFunction Health is ahead	Yes: Yes. 160+ lab tests a year across two blood draws.	No: No. Upload results from any lab you already use.
Clinician review or prescriptionsFunction Health is ahead	Yes: Yes. Clinicians review your results and flag urgent findings.	No: No. ProtocolEngine provides information, not medical care.
Personal plan from your goals and routines	Yes: Yes. A protocol with food and supplement guides, built from your results.	Yes: A two-minute quiz builds a daily protocol around your goals, schedule and what you already take.
Get a plan without buying a test first	No: No. The protocol starts from your blood results.	Yes: Yes. The quiz builds your protocol right away. Lab results add detail when you have them.
Evidence grade on each recommendation, linked to the papers	Not shown per recommendation on its public pages. We could not review the logged-in product.	Yes: Each graded supplement, habit and diet item shows its grade from S to E. Click it to see each paper and how it scored.
Habits, diet and supplements in one plan	Partly: Partly. Food and supplement guides, plus lifestyle advice.	Yes: All three are graded on the same scale and combined in one protocol.
Uses wearable data	Yes: Yes, through connected apps.	Yes: Connects Oura and Withings.
Available in Germany and the EU, in German and French	No: No. Labs in 48 US states; we found no offer outside the US. English only.	Yes: Yes. Available in English, German and French. Account data is stored in the EU.
Price	$365 a year (first-year price; renewal price not published). Add-on tests extra.	Free to browse and to take the quiz. Premium: $12/mo or $99/yr

Check our side yourself

47,268

papers analyzed and graded so far

456

new papers added in the last 7 days

How every grade is calculated Today's research digest Try the interaction checker

Use both, if you can

Function measures. ProtocolEngine grades the evidence. Lab results show where you stand, and graded evidence shows how strong the research is behind a habit, food or supplement. Decisions about your results belong with your doctor.

If Function is not available where you live, start with the quiz. If you have lab work from any provider, you can upload it to see which graded research relates to your markers.

Build your protocol in 2 minutes See pricing

Facts about Function Health were checked against Function Health's own website on October 18, 2026. Prices and features change, so check their site before you buy.

Spotted something out of date or unfair? Tell us and we will correct it: hello@protocolengine.io

ProtocolEngine makes and sells no supplements. Some shop links elsewhere on the site are affiliate links; they never change a grade. ProtocolEngine provides general information based on published research. It is not medical advice, diagnosis or treatment. Affiliate disclosure

Function Health is a name or trademark of its owner, used here only to refer to it. ProtocolEngine is not affiliated with or endorsed by Function Health.

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