Function Health BBB and Consumer-Complaint Trends: What the Data Actually Show

What Is Function Health and How Does Its Business Model Work?

Function Health markets itself as a lab-driven longevity platform. Members pay a flat annual fee, currently approximately $499, to receive access to more than 100 biomarker tests drawn at a local phlebotomy partner. Results are delivered through a proprietary app with physician commentary. The company does not dispense prescriptions or provide ongoing treatment, which places it squarely in the DTC laboratory testing category rather than the telehealth pharmacy category.

CLIA and the Legal Framework for DTC Labs

Any laboratory performing tests on human specimens for clinical purposes must hold a Certificate of Waiver, Certificate of Compliance, or equivalent under the Clinical Laboratory Improvement Amendments of 1988 (CLIA), administered by the Centers for Medicare and Medicaid Services. Function Health uses third-party CLIA-certified reference labs, which means the analytical work meets federal minimum quality standards. CLIA certification does not, however, regulate how results are communicated to consumers or whether adequate clinical follow-up is recommended. The FDA has authority over laboratory-developed tests (LDTs) and has been expanding oversight of this category since 2024, a regulatory shift that could affect how platforms like Function Health structure their testing menus.

State-Level DTC Lab Restrictions

Not every state permits DTC lab testing without a physician order. As of 2025, New York, New Jersey, and Rhode Island require a licensed clinician to order laboratory tests, which means Function Health either cannot operate in those states or must route orders through an affiliated physician. The Association of Public Health Laboratories maintains state-specific guidance relevant to this area. Consumers in restricted states who sign up for Function Health and later discover their results cannot be processed face billing disputes. Complaints of this type appear in third-party review aggregators including Trustpilot and Reddit threads, though the volume remains difficult to quantify from public data alone.

Function Health's BBB Profile: What the Public Record Shows

The Better Business Bureau assigns ratings based on complaint volume, time to resolution, business transparency, and advertising practices. As of early 2025, Function Health does not hold BBB accreditation, and its publicly visible complaint file is sparse, reflecting either low complaint volume, limited consumer awareness of BBB as a resolution channel, or the company's relatively recent founding (2021).

How to Read a Sparse BBB File

A thin BBB complaint file is not automatically reassuring. Companies in the DTC health space often receive consumer grievances through channels other than the BBB, including state attorney general offices, the FTC's Consumer Sentinel Network, and app store reviews. The FTC's guidance on health product claims is directly applicable to any platform making longevity or wellness claims that could be construed as health-outcome promises. A company can have zero BBB complaints and still face regulatory action, as seen in FTC enforcement actions against other DTC health companies.

Complaint Categories Visible in Third-Party Forums

Across Trustpilot, Reddit's r/longevity, and Apple App Store reviews, the complaint categories that appear most frequently for Function Health are:

• Billing and auto-renewal disputes, where members allege difficulty canceling the annual subscription
• Delays in phlebotomy appointment availability in certain metro areas
• Perceived lack of actionable clinical guidance after receiving out-of-range results
• App interface issues preventing result downloads or PDF exports

None of these categories, in isolation, indicate fraud or regulatory violation. Together, they suggest gaps in customer service infrastructure that are common for health startups scaling rapidly. The actionable clinical guidance complaint is more substantive and is discussed below.

The Core Clinical Concern: Are 100-Plus Biomarkers Useful Without Clinical Context?

This is where independent scrutiny matters most. Running a broad biomarker panel on an asymptomatic adult will statistically generate false positives. If a lab test has a 95% specificity and you run 100 tests, you expect approximately 5 false-positive results by chance alone. The U.S. Preventive Services Task Force explicitly cautions against broad screening in asymptomatic populations when the pre-test probability of disease is low, because the harms from follow-up testing and patient anxiety may exceed the benefits.

The False-Positive Problem in Broad Panels

A 2019 analysis in JAMA Internal Medicine examined the downstream consequences of incidental findings from broad diagnostic workups and found that patients frequently underwent additional testing, experienced significant anxiety, and in a subset of cases received unnecessary procedures. Function Health's 100-plus biomarker panel creates the conditions for exactly this pattern. The company's physician commentary feature is intended to mitigate this risk, but the quality and depth of that commentary cannot be independently audited by prospective members.

What Guidelines Say About Specific Biomarkers in the Panel

Function Health's panel reportedly includes markers such as ApoB, Lp(a), DHEA-S, IGF-1, ferritin, homocysteine, and advanced thyroid panels. For several of these:

• The American College of Cardiology / American Heart Association 2019 guideline on cardiovascular risk includes Lp(a) as a risk-enhancing factor worth measuring once in a lifetime for cardiovascular risk assessment, not annually.
• The Endocrine Society's clinical practice guideline on thyroid disease does not recommend annual free T3, reverse T3, or thyroid antibody panels in asymptomatic adults without clinical indication.
• The American Association of Clinical Endocrinology (AACE) position on IGF-1 testing restricts IGF-1 screening to patients with suspected growth hormone excess or deficiency, not general wellness populations.

Running these markers annually in healthy adults is not standard-of-care medicine. The panel may generate clinical value for some members. For others, it may produce anxiety-inducing out-of-range values that require expensive follow-up with a primary care physician or specialist, costs that Function Health does not cover.

Is Function Health Legit? A Structured Assessment

"Legit" means different things in different contexts. The question deserves a structured answer rather than a binary yes or no.

Structural Legitimacy (Business and Legal)

Function Health is a Delaware-incorporated company with Series B funding and identifiable leadership, including co-founder Dr. Mark Hyman (a named clinician whose work is publicly documented). Its laboratory partners hold CLIA certification. It is not listed on the FDA's Medical Device Safety Action Network as a device under investigation, and it does not appear in FDA warning letter databases as of early 2025. The FTC has not issued a public enforcement action against the company. These are baseline markers of structural legitimacy.

Clinical Legitimacy (Does the Model Reflect Evidence-Based Medicine?)

This is a harder question. The USPSTF has found insufficient evidence to recommend many of the biomarker categories included in broad DTC panels for asymptomatic adults. That does not make measurement harmful in all cases. It means the evidence base for annual broad-panel screening in healthy adults is not established. Function Health's own marketing language uses terms like "longevity" and "optimization," which are not regulated medical claims but exist in a gray zone between wellness marketing and implied health promises.

Financial Legitimacy (Billing and Cancellation Practices)

The billing complaints visible in public forums are the category that attracts the most attention. Auto-renewing annual subscriptions in the health space are subject to the FTC's Negative Option Rule, which requires clear disclosure of recurring charges and a simple cancellation mechanism. The FTC finalized updates to this rule in 2024, tightening requirements for subscription-based businesses. If Function Health's cancellation process does not meet these updated standards, it faces regulatory exposure independent of its clinical model.

Regulatory Oversight Field for DTC Lab Companies

Understanding which agencies have authority over Function Health helps consumers know where to file complaints and what protections exist.

FDA Oversight of LDTs

The FDA's final rule on laboratory-developed tests, published in May 2024, phases in premarket review requirements for LDTs over a four-year period. Tests with the highest risk classification face the earliest deadlines. Some of the specialized biomarkers in broad DTC panels may qualify as LDTs subject to this new oversight regime. This is an evolving area, and platforms like Function Health may face menu changes as the rule takes effect.

FTC Authority Over Health Marketing Claims

The FTC Act Section 5 prohibits unfair or deceptive acts or practices, including health claims that imply clinical outcomes not supported by evidence. The FTC's 2023 Health Products Compliance Guidance states that any claim that a product or service can treat, cure, or prevent disease requires competent and reliable scientific evidence. Function Health's marketing language around longevity and biomarker optimization should be evaluated against this standard by anyone assessing the company's compliance posture.

State Attorney General Authority

State consumer protection laws often have broader reach than federal statutes. If a DTC lab company collects payment from residents of a state where DTC testing is restricted, the state attorney general may have grounds for action under consumer protection or unlicensed medical practice statutes. The National Association of Attorneys General maintains a consumer protection resource for consumers who believe they have been harmed by deceptive business practices in their state.

CMS and CLIA Enforcement

CMS CLIA enforcement can result in suspension or revocation of a laboratory's operating certificate for quality violations. Because Function Health uses third-party labs rather than operating its own certified laboratory, the direct CLIA risk falls on those third-party entities. However, a platform that routes tests through a lab that subsequently loses its CLIA certificate would be unable to fulfill its service.

How Function Health Compares to Other DTC Lab Platforms on Complaint Profile

Function Health is not the only DTC lab subscription platform. Competitors include Everlywell, Quest Diagnostics' consumer division, and LabCorp's Pixel service. Each has a different regulatory and complaint profile.

Everlywell as a Reference Point

Everlywell, one of the most widely reviewed DTC testing platforms, has an established BBB file with hundreds of complaints and responses, primarily around result delays and physician ordering processes. The FTC and Everlywell reached a settlement in 2023 over allegations that the company made deceptive marketing claims about its COVID-19 testing products. This settlement is a useful benchmark. It shows that DTC lab companies are not immune to regulatory action, and that the FTC will act when marketing claims outpace evidentiary support.

Quest and LabCorp Consumer Divisions

Quest Diagnostics and LabCorp operate under tightly regulated frameworks as CAP-accredited and CLIA-certified laboratories with direct physician ordering infrastructure. Their consumer divisions inherit this compliance infrastructure. Function Health, as a newer entrant, is still building that track record.

What Consumers Should Verify Before Subscribing

Given the complaint patterns and regulatory considerations above, a prospective Function Health member should verify the following before paying $499:

Confirm CLIA Status of the Processing Lab

Ask Function Health directly which laboratory processes your specimens and request the CLIA certificate number. You can verify any laboratory's CLIA certification status through CMS's online CLIA database. A valid, active CLIA number is the minimum baseline for clinical specimen testing.

Check State Eligibility Before Paying

If you live in New York, New Jersey, or Rhode Island, confirm in writing whether Function Health can legally provide services in your state before entering a billing relationship. Billing complaints in restricted states are avoidable.

Read the Auto-Renewal Disclosure

Under the updated FTC Negative Option Rule, the auto-renewal terms must be disclosed clearly before purchase and the cancellation process must be simple. Document the cancellation steps in writing before subscribing. If the process requires a phone call or multi-day wait, that practice may not comply with the 2024 rule.

Ask Specifically About Out-of-Range Follow-Up

Function Health provides physician commentary on results. Before subscribing, ask whether a physician is available for a real-time consultation if a result is significantly out of range, and whether that consultation is included in the subscription price or billed separately. The perceived lack of actionable guidance after abnormal results is the most clinically significant complaint category in public forums.

A Direct Assessment for Prospective Members

The table below summarizes the four dimensions any consumer should evaluate for a DTC lab subscription service. Use this as a structured checklist, not a pass-fail score.

| Dimension | What to Verify | Where to Verify | |---|---|---| | Analytical quality | CLIA certification of processing lab | CMS CLIA database | | Clinical oversight | Named physician review process, follow-up access | Company's Terms of Service and Welcome materials | | Marketing accuracy | No implied disease treatment or cure claims | FTC complaint database, company website | | Billing practices | Auto-renewal disclosure, simple cancellation | FTC Negative Option Rule 2024, state consumer protection office |

How to File a Complaint If You Have Had a Problem

If you have experienced billing issues, deceptive claims, or service failures with Function Health, the following agencies accept consumer complaints:

• FTC Consumer Sentinel: receives complaints about billing, auto-renewal, and deceptive marketing
• BBB complaint portal: publicly visible complaints with response tracking
• Your state attorney general's consumer protection division
• CMS CLIA complaint process: for concerns about laboratory quality
• FDA MedWatch: for adverse events related to laboratory tests or devices

Filing a complaint creates a public record that regulators use to identify patterns across companies. A single complaint may not trigger action. Aggregate complaint data from multiple consumers is what drives enforcement.