This page compares Function Health and Superpower, the two most-compared biomarker testing memberships in the United States. Every price and product claim below was checked against the companies' own published pages on 3 September 2026 and re-verified on 23 October 2026, and each is linked to its source.
Who publishes this page, and why that matters
This page is published by Merios, which makes blood-test tracking software. Merios competes with both products reviewed here. You should read this page knowing that.
Because of that conflict, three rules govern this comparison. Merios is not the subject of this page and is never ranked first on it. Merios appears only as a clearly labelled third column in the tables, plus one short section and one section describing the cases where you should not use it. And there are no affiliate links anywhere on this page — no referral codes, no tracked links, no commission on anything you buy from either company. We make nothing if you sign up for Function Health or Superpower, which is the only reason a page like this can be written honestly by a competitor.
If you want a comparison where Merios is one of the candidates, read our roundup of blood test tracking apps, which puts Merios against seven other apps on the same six criteria, and discount it accordingly.
The 30-second answer
- Choose Function Health if you want the deepest included panel, clinician review of every result as a stated part of the membership, and the option to add imaging. It is the more conservative, more medical choice.
- Choose Superpower if you want the lower entry price, a published results turnaround, and a more software-forward experience — and if you are comfortable that its marketed biomarker count was the subject of a false-advertising lawsuit, settled in June 2026 without any ruling on the merits.
There is no single winner. The two products are close enough on price that the deciding factors are what the marker count actually means, who reads your results, and how you want blood drawn.
How we picked
These are the criteria, stated before the verdict, in the order we weighted them:
- Annual price, verified against the vendor's own pricing page on the date of publication, not against secondary reviews.
- Price per biomarker, computed by us from the marketed count and the verified price. Nobody in this category publishes this number, and it is the fastest way to see whether a marker count is doing marketing work.
- Marker overlap — how much of each panel is the same core chemistry, and where the panels genuinely diverge.
- Who reviews your results — a physician, a nurse practitioner, a dietitian, a coach, or an algorithm. These are very different products sold with similar language.
- Draw logistics — how many draws per year, where, and whether at-home collection is available.
- Data export and portability — whether you can get your results out in a usable form.
- Cancellation and refund terms, because both of these are annual prepayments.
We did not accept either company's comparison of the other. Both publish pages comparing themselves to their rival; both are marketing.
Price, verified 23 October 2026
| Product | Annual list price | Promotional price | Source (all verified 23 October 2026) |
|---|---|---|---|
| Function Health | $365 per year | None advertised | functionhealth.com/pricing |
| Superpower | $199 per year ($0.55 per day; pricing may vary in New York and New Jersey) | New-member benefit: a complimentary follow-up test valued at $99, added at checkout | superpower.com/pricing |
| Merios (publisher of this page) | Free, $44 per year for Plus | 7-day free trial on the annual plan | merios.life/pricing |
Two notes, because this category moves fast and most comparison pages quote stale figures.
Function Health cut its membership from $499 to $365 per year on 20 November 2025, announced on its own blog. Any page still quoting $499 is close to a year out of date.
Superpower's price has moved more than once. It launched at $199 per year in August 2025 on exiting beta, listed $349 (with a $299 Labor Day promotion) when we first checked on 3 September 2026, and is back to $199 per year on 23 October 2026. The pricing page does not state a renewal price; it describes a yearly membership you can cancel anytime, with no fees, that stays active through the end of the paid year. If you are budgeting for year two, assume the list price can change and check the page before you renew.
Merios does not include a blood draw at any price. That is the single most important asymmetry in the table above and the reason the Merios column is not comparable on price alone. See the section on when Merios is the wrong choice.
Price per biomarker
This is our own computation, not a vendor figure. It divides the verified annual price by the marketed marker count.
| Product | Marketed count | Annual price | Price per marketed unit |
|---|---|---|---|
| Function Health | 160+ lab tests annually, across two draws | $365 | $2.28 |
| Superpower | 100+ biomarkers from one blood draw | $199 | $1.99 |
| Function Health, first draw only (100+ tests per its FAQ) | 100+ | $365 | $3.65 |
| Merios | Not applicable — no lab draw included | $44 | Not comparable |
On the marketed numbers, Superpower is now cheaper per unit, $1.99 against $2.28, and 29 cents is a real gap but not a dramatic one. That is the finding: price per biomarker leans toward Superpower, and the lean is modest. Anyone telling you one is several times better value on price alone is counting something other than the published numbers.
The number moves once you stop taking the marketed counts at face value, and there are two independent reasons to do that.
First, the units are not the same thing. Function counts "lab tests." Superpower counts "biomarkers." Those words are used interchangeably in marketing and are not interchangeable in a lab: a single test can report several values, and a panel count can include ratios calculated from values already counted once. Comparing 160 of one to 100 of the other is not like for like, and neither company publishes a reconciliation.
Second, the counts cover different numbers of draws. Function's 160+ is an annual total across two draws: its FAQ describes 100+ tests at the annual visit and 60+ tests 3 to 6 months later. Superpower's 100+ is a single draw, with one comprehensive blood test included per year; the follow-up test is a new-member benefit valued at $99, not part of the standing annual count. Some members skip the second draw. Take Function's first draw alone and your real cost is nearer $365 divided by about 100, or $3.65 per test — 60 percent above the headline — while Superpower's single-draw figure stays at $1.99. On a one-draw basis the gap widens in Superpower's favor; on the full annual count it narrows, because Function's second draw adds markers that Superpower's standing plan does not.
If you want to understand which markers are worth paying for in the first place, our guide to biomarkers worth tracking for longevity and the breakdown of what belongs in a longevity blood panel are a better starting point than either company's marker count.
The lawsuit, and what it does and does not establish
On 26 January 2026, Function Health filed suit against Superpower in the U.S. District Court for the Central District of California. The case is Function Health, Inc. v. Superpower Health Inc. et al, No. 2:26-cv-00810, and the cause of action is false advertising under the Lanham Act, 15 U.S.C. section 1125. The docket is public on Justia.
According to the complaint as summarized by the law firm ArentFox Schiff in its analysis of the case, Function alleges that:
- Superpower's marketed "100+ lab tests" and "100+ biomarkers" reflected approximately 55 direct measurements, with the remainder derived from calculated metrics rather than new biological signals.
- Superpower's "real clinical team" available "24/7" was in practice responses within 24 hours on weekdays, from dietitians and health coaches rather than physicians or nurses.
- Superpower's claim of "3,000+" lab locations overstated the reality, given that Quest Diagnostics operates roughly 2,250 U.S. patient service centers.
Every one of those is an allegation by a direct competitor, and none was ever proven. On 12 June 2026 the parties filed a stipulation stating that "they have settled this action," and the court dismissed the case the same day, without prejudice to reopening by 13 July 2026 (filings 29 to 31 on the Justia docket). The settlement terms are not public, no court ruled on the merits, and no injunction issued. Superpower did not provide a statement to the trade press covering the filing. A company being sued is not a company being found liable, and Function is not a neutral party — it is the plaintiff, and it competes for the same customer.
What you can verify yourself, independently of the lawsuit, is narrower and more useful: Superpower's own biomarker directory labels a number of entries "Derived Biomarker." Those include the LDL/HDL ratio, the Atherogenic Index of Plasma, the Castelli Risk Indexes, and the Neutrophil-to-Lymphocyte Ratio, each carrying Superpower's disclaimer that the ratio or index "is not an FDA-cleared test." That is not a scandal — derived ratios are clinically standard and useful, and our own reference-range coverage treats them as meaningful. But a derived ratio is arithmetic on numbers you already paid for. It is not an additional thing drawn from your arm, and counting it as one inflates a marker count without adding information.
The practical takeaway for a buyer: do not choose between these two on marker count. It is the least reliable number either company publishes, and it was the subject of a federal lawsuit, now settled.
Who reviews your results
This is where the two products genuinely differ.
| Function Health | Superpower | Merios (publisher) | |
|---|---|---|---|
| Stated review model | "Clinicians review every result and flag issues" | Licensed physicians, nurse practitioners and pharmacists listed as providers; care team plus AI | Software only — no clinician, no medical review |
| Result explanations | Written by physicians, delivered per marker | AI plus care team guidance | Algorithmic, referenced to published ranges |
| Source | functionhealth.com/faq | superpower.com/faqs | Merios product |
Function states clinician review of every result as an included, non-optional part of the membership. Superpower describes a care team of licensed providers alongside its AI layer but does not specify which professional type reviews an individual result — the distinction the lawsuit contests. Merios reviews nothing: it is analysis software, not a medical service, and it has no clinicians.
Draw logistics, export, and cancellation
| Function Health | Superpower | Merios (publisher) | |
|---|---|---|---|
| Draws per year | 2 | 1 included (plus a complimentary follow-up test for new members, valued at $99) | None — you bring existing results |
| Where | 2,000+ Quest locations across 48 states, plus mobile phlebotomy — Function advertises "2,000+ labs or we'll come to you" | At-home or 2,000+ labs nationwide; at-home carries an additional fee | Any lab, anywhere |
| Results turnaround | Not published as a guarantee | "10 days or less" | Immediate on upload |
| Data export | Download results as PDF; reports and imaging files downloadable; no CSV advertised | "You can download or delete your data at any time" | Export supported |
| Cancellation | "Cancel and rejoin at any time"; pauses not offered | "Cancel anytime" | Monthly, cancel anytime |
| Refunds | "Function does not offer refunds for prior payments" | "Superpower does not offer refunds at this time" | Monthly billing, no annual prepayment |
Both companies take an annual prepayment and neither refunds it. That is the most financially consequential line in this comparison, and it is buried in both FAQs.
On portability: Function's PDF export is fine for handing to a physician but poor for tracking a marker across years, since you cannot easily get the values into a spreadsheet. Superpower's language is broader but unspecific. Neither publishes a documented personal-data API. If trend tracking matters, read how often you should actually get bloodwork before committing — testing cadence is a bigger lever on cost than either sticker price.
Marker overlap
We compared the two published biomarker directories at the category level, not line by line, so we will not claim a precise overlap percentage we did not compute.
At that level the panels overlap heavily. Both cover the standard core: complete blood count, comprehensive metabolic panel, full lipids including ApoB and Lp(a), thyroid, sex hormones, inflammatory markers, iron studies, and vitamin D and B12. For most buyers, the markers you will actually act on are in both. The divergence is at the edges — specialty add-ons, heavy metals, and biological age scoring, where both use proprietary models rather than a published algorithm. If biological age is your reason for buying, understand how biological age is calculated from blood first, because proprietary scores are not comparable across products.
Choose Function Health if
- You want the panel depth and you want a clinician's review of every result stated as part of what you bought, not implied.
- You want imaging under the same membership. Function advertises adding MRI and CT anytime, plus the Galleri multi-cancer test and brain testing, priced on top of the $365.
- You value the more explicit, more conservative claims. In a category where marketing language is being litigated, that is worth something.
- You want the widest single catalogue — blood, imaging and specialty add-ons — bought from one vendor rather than assembled.
- You can absorb $365 up front knowing it is non-refundable.
Choose Superpower if
- You want the lower entry price, especially if you can catch the promotional first year — a $66 saving against Function's standing rate in year one, and $16 a year after that.
- You want a published turnaround. Superpower commits to results in "10 days or less"; Function publishes no equivalent guarantee.
- You will never use imaging. Function's add-ons are priced on top of the $365, so if you only want blood, you are paying into a catalogue you will not touch.
- You prefer a heavier software and AI layer, and you are comfortable weighing the marker-count dispute yourself rather than accepting Function's account of it.
Where Merios fits
Merios is analysis software for blood tests you already have: it parses lab PDFs from any lab, tracks markers over time, and combines them with Apple Health data. It costs less than either product here because it does not include a blood draw — which is most of what you are paying Function and Superpower for.
It is a different category, not a cheaper version of these two. If you already get comprehensive bloodwork, it is worth a look, and we cover the wider category in our roundup of blood test tracking apps. If you do not, it solves nothing on its own.
When Merios is the wrong choice
We would rather you buy the right thing than the thing we sell. These are real cases where Function Health or Superpower is the correct purchase and Merios is not:
- You do not currently get bloodwork and do not want to arrange it. Merios has no lab. You would need to source a comprehensive panel yourself, and buying one a la carte typically costs more than either membership. Buy Function or Superpower.
- You want a clinician to look at your results. Merios has none. It cannot flag a dangerous value to a human, and it is not a medical service. If a physician reviewing your labs is what you actually want, Function states this explicitly as part of the membership. Buy Function.
- You want imaging. Merios does not do MRI, CT, or cancer screening. Function does.
- You want one price that covers everything. Merios' lower sticker price excludes the lab fee. Once you add a comprehensive panel, your total annual cost can exceed $365, at which point Function is both cheaper and more complete.
- You need at-home blood collection. Merios cannot arrange a draw of any kind. Both alternatives can — Function advertises mobile phlebotomy, and Superpower offers at-home collection for an additional fee.
- You are not in the Apple ecosystem. A significant share of the Merios value is Apple Health integration. Without an iPhone, much of the product does not apply, and both alternatives here are platform-neutral.
The bottom line
On prices verified 23 October 2026, Superpower at $199 is materially cheaper than Function Health at $365, and price per marketed unit — $1.99 against $2.28 — leans the same way, though Function includes a second draw and Superpower's standing plan does not. What still separates them is the reliability of what those numbers describe.
Function makes narrower, more specific claims about who reads your results, and publishes a price history you can check. Superpower is cheaper at the entry point, publishes a results turnaround Function does not, and settled a false-advertising suit, filed by Function Health, over the exact claims a buyer here most wants to trust — allegations no court ruled on, settled in June 2026 on terms that are not public. Either way, buy on what you can verify yourself: who reviews your results, where you get drawn, what you can export, and what you cannot get refunded.
Sources, verified on 3 September 2026 and re-verified on 23 October 2026: Function Health membership pricing and FAQ (functionhealth.com/pricing, functionhealth.com/faq, functionhealth.com/article/function365); Superpower pricing, FAQ and biomarker directory (superpower.com/pricing, superpower.com/faqs, superpower.com/biomarkers); Function Health, Inc. v. Superpower Health Inc. et al, No. 2:26-cv-00810 (C.D. Cal., filed 26 January 2026), docket via Justia, complaint allegations as summarized by ArentFox Schiff. All statements about the litigation are unproven allegations; the case was settled and dismissed on 12 June 2026 (filings 29 to 31) and no court ruled on the merits. This page contains no affiliate links and no referral codes. It is published by Merios, a competitor to both products reviewed.
This article is for informational purposes only and is not medical advice. It does not diagnose or treat, and blood test results should be interpreted by a qualified healthcare professional who knows your history. Prices and features change frequently in this category; this page will be updated when either product changes materially, and the verification date above tells you how current it is.