Quick answer: Function Health Trustpilot ratings fall in the 4.5 to 4.7 star range as of mid-2026, driven mostly by praise for biomarker depth and result clarity. Its BBB profile exists but the company is not BBB-accredited, which is typical for DTC health-tech startups and tells you almost nothing about service quality on its own. Google reviews skew positive but are thinner in volume. For a meaningful comparison, the pattern across all three platforms is more revealing than any single score.
What is Function Health’s Trustpilot score right now?
Function Health’s Trustpilot score sits in the 4.5 to 4.7 range with several hundred verified reviews, a respectable volume for a subscription health service that launched publicly in 2022. The platform is invite-only or waitlist-driven, which naturally skews the review pool toward motivated, health-engaged users who self-selected hard. That selection effect is worth remembering when you read the scores: the average Function Health member is not a casual patient who walked into a CVS MinuteClinic. They researched, waited, and paid upfront. That group writes better reviews on average across every industry, not just health-tech.
Star ratings only tell you what other people think. Your own 100+ biomarker results tell you what’s true for you. One at-home Superpower draw checks 100+ biomarkers, physician-reviewed.
Recurring themes in positive Trustpilot reviews include the breadth of the panel (100+ biomarkers in one draw), the app’s ability to flag out-of-range results with plain-language explanations, and the feeling of getting data a primary care doctor never ordered. Negative reviews cluster around three specific friction points: phlebotomy scheduling delays, results that took longer than the promised window, and difficulty canceling or pausing a membership. Those complaints are consistent enough across platforms to treat as structural, not isolated incidents. You can read a deeper breakdown in our function health bad reviews analysis.
How does Trustpilot actually verify these reviews?
Trustpilot uses an invitation-based verification system where companies send review invites directly to customers after a transaction. Verified reviews carry a small checkmark and are harder to fake than open-invitation platforms, but the system is not foolproof. Companies can flag reviews for removal if they dispute authenticity, and Trustpilot does remove some flagged reviews after investigation. The practical implication for Function Health: if the company actively invites satisfied members to review, the score will drift upward from the true median experience. That is not fraud, it is normal business practice, and every consumer brand does it. Interpret a 4.6 on Trustpilot as “solidly good, with known edge-case problems” rather than “perfect.”
A healthy Trustpilot profile for a health-tech service should show at least a few 1- and 2-star reviews addressed publicly by the company. If a brand has 500 reviews and zero critical responses, that is a red flag. Function Health does respond to negative reviews, usually within a few business days, which is a reasonable sign of operational maturity.
What does Function Health’s BBB rating mean (and not mean)?
Function Health has a BBB profile but is not BBB-accredited, meaning it has not paid for accreditation or agreed to BBB’s voluntary standards program. That is the default status for most DTC tech companies and says nothing meaningful about whether the service is trustworthy. The BBB letter grade (typically A or A+ for newer companies with low complaint volume) is calculated on a scale that heavily weights complaint resolution speed, not product quality. A company that handles all complaints fast can hold an A+ while still delivering a mediocre product. A company that delivers an excellent product but ignores one complaint can drop to a B.
For context, the BBB complaint count matters more than the letter grade. If a company of Function Health’s size (tens of thousands of members) shows 10 to 30 complaints over two years, that is low. If it shows 200+, that suggests a systemic issue. The most common BBB complaints filed against DTC health services involve billing disputes, cancellation difficulty, and unfulfilled refund requests, which maps closely to what shows up on Trustpilot for Function Health. When two independent complaint channels surface the same specific friction point, take it seriously.
What do Function Health’s Google reviews say?
Google reviews for Function Health are thinner in volume than Trustpilot, which is expected. Google My Business reviews require a physical location to anchor a review, and Function Health’s draw sites are typically third-party Quest Diagnostics or Labcorp patient service centers, not Function-branded locations. Reviews that do exist often describe the experience at the draw site, not the platform itself, which creates a measurement mismatch. A 4-star Google review might be rating the phlebotomist’s bedside manner, not the app’s biomarker interpretation quality.
The more useful Google data comes from searching “Function Health” and reading the Knowledge Panel complaints box and the “Reviews from the web” aggregate. Scores in the 4.3 to 4.6 range appear consistently across aggregators, which aligns with the Trustpilot figure. Divergence between Trustpilot and Google of more than 0.5 stars would signal something worth investigating. Right now, they track closely.
What do the negative reviews actually describe?
Across Trustpilot, BBB, and Reddit (which is worth reading alongside formal review platforms for unfiltered texture), the negative Function Health feedback concentrates into four buckets:
- Scheduling friction: Users in some markets report 2 to 4 week waits for a phlebotomy appointment, especially outside major metros. Function Health uses Quest and Labcorp draw sites, so appointment availability depends on those networks, not on Function directly.
- Turnaround time variability: The stated turnaround is around 7 to 10 business days. Some users report hitting 14 to 21 days, often without proactive status updates from the app.
- Cancellation difficulty: Multiple reviewers describe canceling as requiring a phone call or email rather than a self-serve in-app button. This is a known DTC subscription dark pattern and is the most common BBB complaint category for the brand.
- Doctor follow-up gap: Function Health provides results with AI-assisted interpretation and access to a medical team, but the service is not a primary care replacement. Some users expected more proactive physician outreach when a result was flagged, and felt the platform under-delivered on that front.
None of these complaints suggest the lab data itself is wrong. For questions about result accuracy specifically, see are function health results accurate.
How does the rating profile compare to Superpower?
Superpower is Function Health’s closest direct competitor on panel depth and membership model. Superpower currently holds strong ratings on Trustpilot as well, with a similar score band and a complaint pattern that overlaps but differs in one meaningful way: Superpower’s negative reviews mention phlebotomy access less often (the company has expanded its mobile phlebotomy option more aggressively) and mention the doctor review call as a specific positive more often. The presence of a real physician reviewing results and discussing them with the member is the feature that consistently earns Superpower its best reviews.
Function Health’s lawsuit with Superpower (settled June 18, 2026) and the resulting intellectual property clarity mean both companies are now competing on product merits rather than legal distraction. That is good for consumers: both services are investing in product quality, and reviews posted after mid-2026 will reflect that stabilized competitive dynamic more accurately than reviews from 2023 to 2025 when operational turbulence was higher at both companies.
For a side-by-side breakdown of what each panel covers and what the membership fee buys, the superpower blood test review covers the full comparison.
The simplest way to actually get this done
Superpower is a full-body lab membership that runs 100+ biomarkers, has each result reviewed by a doctor, and tracks your numbers year over year (about $199/year). It is what we point readers to when they would rather get one clean, complete draw than chase single tests one at a time. Here is superpower reviewed in full.
How to read third-party review platforms for any health service
A few principles apply whether you are evaluating Function Health, Superpower, Labcorp OnDemand, or any other DTC health offering:
| Platform | Best for | Weakness | What to look for |
|---|---|---|---|
| Trustpilot | Volume of verified post-purchase reviews | Company-invited reviews skew positive | Sort by 1-star; read company responses |
| BBB | Complaint resolution patterns | Grade does not reflect product quality | Complaint count and resolution rate, not letter grade |
| Google Reviews | Geographic draw-site experience | May reflect phlebotomy site, not platform | Aggregated score across aggregators |
| Reddit (r/bloodwork, r/HealthInsurance) | Unfiltered, long-form experience posts | Self-selected frustrated users over-represented | Specific feature mentions, upgrade/cancel stories |
| App Store / Google Play | App UX and notification reliability | Version-locked, often outdated after updates | Trend over last 90 days, not all-time average |
The strongest signal is cross-platform consistency. If the same complaint (say, cancellation difficulty) shows up on Trustpilot, BBB, and Reddit, treat it as a confirmed product limitation, not an outlier. If a negative point appears only on one platform and is not corroborated elsewhere, it may be an isolated incident or a bad-faith review.
Should third-party ratings change your decision to join Function Health?
A 4.5 to 4.7 Trustpilot score with 400 to 600 reviews is genuinely good for a health-tech subscription product. It does not mean the service is perfect, but it does mean the majority of members who bothered to write a review had a positive enough experience to say so publicly. The friction points that surface in negative reviews are real and worth knowing about before you sign up, particularly the cancellation flow and phlebotomy scheduling in non-metro markets.
What the ratings cannot tell you is whether the 100+ biomarker panel is the right tool for your specific health situation. That depends on whether you have a clinician who will act on the results, whether you have a baseline condition being monitored, or whether you are a generally healthy adult building a longitudinal data set. Talk to a clinician about which results deserve follow-up. For a complete picture of what the membership includes and what the panel costs relative to self-pay alternatives, see the function health review and the function health cost breakdown.
Why a 4.6 average can hide the experience you will actually have
A single star average flattens a distribution, and the distribution is where the real information lives. Two companies can both post a 4.6 while delivering very different experiences. One might have almost every review at 5 stars with a thin tail of 1-star outliers. Another might be bimodal: a big cluster of 5-star reviews and a meaningful cluster of 1-star reviews, with very little in the middle. That second shape, common in subscription services, tells you the experience is polarized, and which camp you land in often depends on one variable, such as whether phlebotomy is easy in your zip code.
How to read the distribution rather than the average:
- Open the star breakdown that most platforms show as a bar chart. A healthy profile tapers smoothly from 5 down to 1. A U-shaped profile signals a make-or-break variable worth identifying before you buy.
- Read the 1- and 2-star reviews first, then the 3-star reviews. Three-star reviews are the most honest tier because the reviewer had a mixed experience and had no strong incentive to exaggerate in either direction.
- Look for a shared root cause in the low reviews. If ten 1-star reviews all describe the same cancellation friction, that is a structural issue you will likely encounter too. If they describe ten unrelated one-off problems, the service is probably fine and you are reading normal noise.
- Weight recent reviews heavily. A subscription company’s operations change quarter to quarter. A 1-star review from two years ago about a problem the company has since fixed should not weigh as much as a pattern from the last 90 days.
Applied to Function Health, the average sits in good territory, but the useful signal is that the low-star tail keeps naming the same handful of operational frictions. That consistency is what you plan around, not the headline number.
How to vet a DTC health company beyond the star ratings
Review scores measure satisfaction, not substance. For a health service handling your blood and your medical data, several factors matter more than a Trustpilot average, and none of them show up in a star rating:
- Which laboratory actually runs the panel. The analytical quality of your results comes from the performing lab. Established reference networks operate under federal CLIA certification and often College of American Pathologists accreditation. Confirm the company discloses its performing labs rather than obscuring them.
- The refund and cancellation policy in writing. Since cancellation friction is the single most common complaint category for services in this space, read the policy before you subscribe, not after. Know whether canceling is self-serve, whether refunds are prorated, and what happens to your data.
- Data handling and privacy terms. A blood-testing service holds unusually sensitive information. Read how the company de-identifies or shares data for research, whether it sells or licenses aggregate data, and how you can delete your record. These terms are set by the privacy policy, not by any regulator, so they vary widely.
- Physician involvement model. Some services provide algorithmic result flags only, others include a clinician reviewing each panel. This is a real difference in what you are buying and a frequent theme in the reviews that praise or criticize a service.
- Whether you have someone to act on results. A comprehensive panel is only as useful as the follow-up. If you do not have a clinician who will interpret and act on abnormal findings, factor in how the service supports that step.
A five-star review from someone whose priorities differ from yours is weak evidence for your decision. These structural factors are stronger.
How to write a review that actually helps other buyers
If you use one of these services and want your review to be useful rather than just venting or gushing, a few habits make it far more valuable to the next reader and more likely to prompt a real response from the company:
- Name the specific variable. Say which market you are in for phlebotomy complaints, how many days your results actually took versus the promised window, and which exact step of cancellation failed. Specifics let readers judge whether your experience will match theirs.
- Separate the lab from the platform. If the draw site was unpleasant but the results and app were excellent, say both. Conflating a third-party phlebotomy experience with the platform’s quality is the most common way reviews mislead.
- Date your experience. Note when it happened. Operations change, and a reader needs to know whether your review reflects current service.
- If disputing a charge, document first. For a billing or refund problem, keep dated screenshots of the cancellation attempt and any support correspondence. A BBB complaint or Trustpilot review backed by documentation is far more likely to be resolved than a general accusation.
The reason this matters here is circular in a useful way: the reviews that helped you decide were written by people who took these steps. Paying it forward keeps the aggregate signal honest for the next person weighing Function Health against a cheaper or physician-led alternative.
Turn what you just learned into action.
Superpower lets you test 100+ biomarkers from home, then re-check them over time so you can actually see progress, physician-reviewed at every step.
FAQ
What is Function Health’s Trustpilot score?
Function Health’s Trustpilot score is in the 4.5 to 4.7 range as of mid-2026, based on several hundred verified post-purchase reviews. The most praised features are biomarker depth and the plain-language result explanations. The most common criticism involves scheduling delays and cancellation friction.
Is Function Health BBB accredited?
No. Function Health has a BBB business profile but is not accredited, meaning it has not enrolled in BBB’s voluntary standards program. This is the default status for most DTC health-tech companies and does not indicate a problem. The more useful BBB data point is the complaint count and how the company resolves those complaints, not the accreditation status or letter grade.
What does Function Health’s BBB rating actually mean?
The BBB letter grade reflects complaint volume and resolution speed, not product quality or clinical accuracy. An A or A+ rating from BBB for a company with few resolved complaints says the company answers complaints promptly. It says nothing about whether the panel is worth the annual fee or whether the app interpretation is clinically meaningful.
Are there fake reviews on Function Health’s Trustpilot page?
There is no public evidence that Function Health has systematically posted fake reviews. Trustpilot’s invitation model does create an inherent positive skew because companies send review requests to recent customers after a transaction, which over-samples satisfied users. This is normal practice industry-wide, not specific to Function Health. Reading the 1- and 2-star reviews gives a more representative picture of where the service falls short.
What do negative Function Health reviews focus on most?
Across Trustpilot, BBB, and Reddit, the four most consistent complaints are: phlebotomy appointment waits in smaller markets, result turnaround time exceeding the stated window, difficulty canceling via self-service, and a gap between the automated result flags and proactive physician follow-up. None of the recurring complaints question lab accuracy. For a full review of what reviewers say about quality, see function health bad reviews.
How does Superpower’s review profile compare to Function Health’s?
Both services hold similar aggregate scores on Trustpilot. Superpower’s reviews more frequently highlight the physician review call as a specific differentiator, while Function Health’s reviews more often praise the breadth of the panel. Superpower complaints mention phlebotomy access less frequently. Checking both profiles side by side is worth doing before deciding between them. For the full comparison, the superpower blood test review covers pricing, panel composition, and doctor access differences.
Can I trust Google reviews for Function Health?
Google reviews for Function Health are sparse and often reflect the draw-site experience at a Quest or Labcorp patient service center rather than the Function Health platform itself. Treat Google reviews as supplementary, not primary. The Trustpilot score, which is anchored to verified purchases of the Function Health membership specifically, is the more reliable aggregate signal.
Does Function Health respond to negative reviews?
Yes, Function Health does post public responses to negative Trustpilot reviews, typically within a few business days. The responses acknowledge complaints and redirect users to the support channel. This is a baseline expectation for a company at this scale and is better than no response, though it does not tell you whether the underlying issue (say, a refund dispute) was actually resolved to the member’s satisfaction.
How much does Function Health cost compared to Superpower?
Function Health’s membership runs around $499 per year for the standard panel as of mid-2026, with add-on tests priced separately. Superpower’s full-body membership runs about $199 per year and includes the physician review call. For the detailed cost comparison, see how much does superpower cost and the function health cost breakdown side by side.
Where can I find the most unfiltered Function Health reviews?
Reddit threads in r/bloodwork, r/HealthInsurance, and r/Biohackers tend to produce the most candid long-form experiences because users are not responding to a company invite and are not constrained to a star rating. Search “Function Health” with date filters set to the past 12 months to avoid outdated posts from the 2022 to 2023 launch period, when the service was still scaling and operational problems were more common.
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