Function Health publishes more about its referral terms than almost any brand in this category, and it runs four separate programs rather than one. Two of them pay nothing to the referrer by design.
Checked 10 September 2026.
Four programs, and which one pays
| Program | Who it is for | What the referrer gets |
|---|---|---|
| Member referral | Active Function members | “$25 to you for every successful referral” |
| Creator program | Applicants via Typeform | Not published |
| Practitioners referral | Licensed healthcare practitioners | Nothing. Fees are barred by regulation |
| Providers referral | Providers | Nothing. Patient gets a $25 credit |
The member program is the only one with a published number. Its terms, in Function’s own words: “$25 to you for every successful referral,” qualifying once “the person remains a member for 60 days,” with “$25 toward the first year of membership for the person you refer.” There is “No cap.”
Function’s FAQ also notes the program previously paid $100 per successful referral and has since changed to $25. Worth knowing if you find the older figure quoted elsewhere.
Eligibility is restrictive. “If you’re an active Function member (and not a licensed healthcare practitioner), you’re in.” You have to be a paying member to earn, which rules out most publishers.
The creator program, which is what publishers want
Function’s creator page publishes a three step process and nothing else. Tell us about yourself, get onboarded, start testing and sharing. Applications route to a Typeform.
Commission rate, cookie window, minimum payout and payment schedule: not published. Its referral agreement terms defer the money entirely to a private document, stating that payments “shall be calculated and paid pursuant to the Order Form.”
Platform: Impact, confirmed three times
Function states it directly on three separate pages. Its FAQ: “Referral fees are paid by direct deposit through our partner, Impact.” Its practitioner and provider pages both tell you to “log in to Impact to view clicks, conversions, and overall link performance.”
Minimum payout and schedule are still not published, but Impact’s own published terms would apply: withdrawal on the 1st or 15th monthly with a $10 floor on the fixed-day option, or a threshold you set.
The restrictions, which are unusually detailed
Function publishes a promotion and endorsement policy alongside its referral agreement terms. The substantive points:
- Disclosure must use full words. “Spon” and “collab” are explicitly prohibited. Approved forms include “Paid partnership with Function Health” and “Function Health Ambassador.” This tracks FTC influencer guidance, which rejects the same abbreviations.
- You must have used the product. Endorsements must “reflect Collaborator’s honest opinion, finding, belief and experience,” and partners cannot promote products they have not personally tried.
- Licensed healthcare practitioners cannot earn referral fees, which Function attributes to regulation.
- No third party lab compensation. Partners may not “seek nor accept compensation arising from or relating to a Partner Member signing-up for” third-party lab or medical services.
- Gift purchases do not qualify. “No, gift purchases aren’t eligible for referral fees.”
- Two year term, 30 day exit. Function may terminate for convenience on 30 days notice.
None of Function’s pages carry a visible last-updated date, and the referral agreement’s effective date is tied to a private order form. That is worth noting when you rely on any of the above.
What is genuinely unknown
Cookie window. Function publishes no attribution period on any page, and no third party listing carries one either. The only public network listing found, on Sovrn Commerce, shows approval status “Open” with no rate and no cookie.
For a program built on lab testing, where the consideration period is long, that gap matters. Ask before you commit content to it.
Related
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- Our affiliate program
Sources
- Function Health FAQ
- Function Health for creators
- Practitioners referral program
- Providers referral program
- Referral agreement terms
- Promotion and endorsement policy
- FTC Disclosures 101 for influencers
Last reviewed 10 September 2026. Terms change without notice and Function’s pages carry no last-updated dates. Verify against the source links before making a commercial decision. This page reports published commercial terms and is not an endorsement.
This article is for general information. It is not medical advice and it is not a recommendation for any particular treatment. Whether a treatment is appropriate for you is a decision for a licensed clinician who has reviewed your health history and current medications.
