Function Health is a membership-based health technology platform providing access to 160+ advanced lab biomarkers annually. Co-founded in 2022 by Dr. Mark Hyman and Jonathan Swerdlin, it gives members direct access to comprehensive preventive health data through Quest Diagnostics blood draws.
Membership costs $499 per year and includes two testing rounds, clinician-written notes, and a personalized action plan. The standard panel tests 160+ biomarkers covering hormones, heart health, cancer markers, aging, and mental focus, covering what could cost up to $15,000 through traditional healthcare.
Reviewers praise the comprehensive testing coverage and empowering data insights, while common complaints involve expensive add-ons, information overload, and the absence of ongoing coaching. This review covers what is included, who it is for, and whether Function Health is worth the price.
What Is Function Health?
Function Health is a membership-based health technology platform that provides access to 160+ advanced lab tests annually for $499 per year, co-founded by Dr. Mark Hyman and tech entrepreneur Jonathan Swerdlin in 2022. It focuses on preventive, proactive health data rather than reactive symptom treatment.
The platform partners with Quest Diagnostics for blood draws at thousands of locations nationwide. Members receive two rounds of testing per year: a comprehensive initial panel of 100+ biomarkers, followed by a retesting session 3-6 months later to track changes.
Function Health is a healthcare technology company, not a medical provider. It does not offer diagnoses, prescriptions, or treatment plans. All lab services are provided by independent third parties, and results should be discussed with a licensed healthcare provider.
Who Founded Function Health?
Function Health was co-founded in 2022 by Dr. Mark Hyman, a former physician at the Cleveland Clinic Center for Functional Medicine and a leading voice in preventive medicine, alongside tech entrepreneur Jonathan Swerdlin. Dr. Hyman calls it his most fulfilling venture.
Dr. Hyman built Function around his P4 medicine philosophy: predictive, preventive, personalized, and participatory. His goal was to shift healthcare from reactive treatment to proactive prevention by giving individuals direct access to their own comprehensive health data.
What Tests Does Function Health Include?
Function Health includes 160+ lab biomarkers annually covering hormones and thyroid, heart and metabolic health, cancer and silent risk markers, aging biomarkers, and mental health and focus indicators. The standard panel covers far more than a typical doctor’s annual physical.
Function Health Test Categories:
- Hormones and thyroid (including testosterone, estrogen, TSH, T3, T4)
- Heart and metabolic health (LDL, HDL, ApoB, lipoprotein(a), glucose, insulin)
- Cancer and silent risk markers
- Aging and biological age biomarkers
- Mental health and focus indicators
- Autoimmunity, nutrient levels, and inflammation markers
Traditional annual physicals average just 19 lab tests. Function’s panel provides the equivalent of what could cost up to $15,000 (about 15,800 USD) if ordered individually through the standard healthcare system.
How Does Function Health Work?
Function Health begins with sign-up and a health history intake, followed by scheduling a blood draw at a nearby Quest Diagnostics location. Results are returned to the member’s online dashboard with clinician-written notes and personalized action plans.
Members fast before their blood draw and follow specific preparation instructions from Function. The phlebotomy appointment typically takes 15-20 minutes. Results are delivered within days via the web platform alongside detailed interpretation from Function’s clinical team.
After receiving results, members get a personalized action plan with food recommendations, supplement suggestions, and health priorities. A follow-up test occurs 3 or 6 months later to track changes from any interventions made.
What Are the Clinician Notes?
Clinician notes are written interpretations of each member’s lab results, provided by Function’s clinical team to explain what the numbers mean and flag any results that require attention. They translate raw biomarker data into actionable language.
The notes cover what each result means for the member’s specific health picture, what to prioritize, and what lifestyle or dietary changes may improve future results. Function’s clinicians review every result and flag issues proactively.
Does Function Health Have an App?
No. Function Health currently does not have a dedicated mobile app; all results and health data are accessed through the web platform on desktop or mobile browser. Sharing results with a doctor requires screenshots or printed reports.
The lack of an app is a noted limitation in reviews. Members who want to share results with their primary care physician must take screenshots or export sections of their dashboard. Function has indicated plans to expand its platform features over time.
What Are the Benefits of Function Health?
Function Health provides access to over 100 advanced biomarkers that most primary care doctors do not routinely test, including lipoprotein(a), apolipoprotein B, ferritin, iron binding capacity, and detailed hormone panels. These tests catch issues that standard checkups miss.
Only 14% of cancers are found through routine screenings. Function’s expanded panel includes cancer risk markers and biological age assessments that fall entirely outside the scope of a typical annual physical. Members also have access to optional MRI and CT scans at member-only pricing.
The platform has completed 50 million lab tests across its member base. Backed by celebrity investors including Matt Damon, Zac Efron, Pedro Pascal, Jay Shetty, and Blake Griffin, Function grew a waitlist of 200,000+ in its first year of launch.
Does Function Health Produce Real Results?
Yes. Function Health enables members to track measurable biomarker improvements across testing cycles, with documented cases including one member dropping LDL-C cholesterol by 100 points through diet alone after seeing his initial results. Data-driven insight drives action.
One reviewer reported losing roughly 10 pounds (4.5 kg) within three months after receiving and acting on Function results, citing heart health awareness and supplement recommendations as key motivators. Multiple members describe it as the best healthcare purchase they have made in decades.
Is Function Health Available Nationwide?
Yes. Function Health is available in all US states except New York and New Jersey for the full lab testing membership, using Quest Diagnostics locations nationwide for blood draws. No in-person clinic visits are required beyond the phlebotomy appointment.
Members schedule their Quest Diagnostics appointment at a time that suits them, including early morning and weekend slots. Quest locations are available within a short drive for most US residents. Function also offers optional advanced imaging scans through a separate partner.
What Do Function Health Reviews Say?
Function Health holds a 4-star average rating from 1,012 reviews, with users consistently praising the comprehensive testing, detailed clinician notes, and motivational impact of seeing their own health data. The Gene Food reviewer awarded an A- overall rating.
Function Health Review Summary:
| Aspect | Verdict |
|---|---|
| Lab comprehensiveness | Excellent (160+ biomarkers) |
| Clinician notes quality | Strong, actionable |
| Cost vs. standard testing | High value ($499 vs. $15,000 equivalent) |
| Add-on costs | Can exceed $1,000+ |
| Ongoing coaching | Not included |
| Mobile app | Not available |
Critical reviews highlight information overload, anxiety-inducing results without sufficient context, and the cost of add-on tests that can push the total well beyond $1,000 per year.
What Are the Positive Function Health Experiences?
Positive reviewers consistently describe feeling empowered, informed, and more aware of their health after receiving Function results, with many calling it the most comprehensive testing they have ever received. Motivation to improve habits is a common theme.
One member discovered answers to years of PCOS and IBS struggles through Function’s comprehensive testing. Another caught a health issue that standard care had missed entirely. The platform’s speed, convenient Quest locations, and professional presentation earn praise across reviews.
What Are the Common Complaints About Function Health?
The most common complaints center on expensive add-ons that inflate the annual cost, information overload without adequate guidance, and the absence of ongoing coaching or a direct doctor relationship. Anxiety from out-of-range results without context is frequently reported.
Here’s what no one tells you: Function’s base panel is excellent, but add-ons for autoimmunity, Lyme, and advanced cancer screenings can push costs well over $1,000 per year. The platform also leaves users to act on their data independently, which works for biohackers but frustrates those seeking guided care.
Common Complaints:
- Add-on tests significantly increase the total annual cost
- No ongoing coaching or accountability support
- No mobile app for easy result sharing
- Information overload and anxiety-inducing results without context
- Slow turnaround times on some test results
- Limited integration with a holistic health picture
What Are the Side Effects of Function Health Testing?
Function Health testing involves standard blood draws at Quest Diagnostics, which carry the typical minor side effects of venipuncture including brief discomfort, bruising, and lightheadedness in some individuals. These are not unique to Function and resolve quickly.
A more notable risk is psychological: receiving 100+ biomarker results without adequate medical context can cause significant anxiety. Multiple reviewers and even Dr. Richard Bruno of the American College of Preventive Medicine note that patients often arrive at their doctors alarmed by results that turn out to be clinically insignificant.
Function Health itself does not offer diagnoses or medical advice. The platform explicitly states that its services are not a substitute for medical care. Members with concerning results should consult a licensed healthcare provider for proper interpretation and next steps.
Who Should Avoid Function Health?
Function Health is not suited for people who need a guided, ongoing medical relationship, those prone to health anxiety without professional context, or anyone in New York or New Jersey where the service is not currently available.
The platform is also a poor fit for people expecting a replacement for primary care. Function does not prescribe, diagnose, or treat conditions. Someone managing chronic illness who needs coordinated care will get more value from a platform like Allara Health or a functional medicine physician.
How Much Does Function Health Cost?
Function Health membership costs $499 per year (approximately $42 per month) and includes 160+ lab tests annually with two testing rounds, clinician notes, personalized action plans, and access to optional add-on tests. HSA and FSA accounts are eligible.
Add-on tests such as autoimmunity panels, Lyme disease screening, and advanced cancer markers are priced separately and not included in the base membership. Multiple reviewers note that add-on costs can rapidly push the annual total to over $1,000 (approximately 1,000 USD).
Is Function Health Covered by Insurance?
Partially. Function Health uses Quest Diagnostics as its lab partner, meaning members with strong insurance coverage may have many standard panel tests covered by their plan, particularly for the default biomarker set. Coverage varies by plan and individual test.
Function Health itself does not bill insurance directly. Members pay the $499 annual fee regardless of insurance coverage. Lab costs for the base panel are prepaid within the membership fee; add-ons require separate out-of-pocket payment.
Is Function Health Worth the Price?
Yes, for the right person. Function Health provides access to 160+ biomarker tests that would cost up to $15,000 (about 15,000 USD) if ordered individually, making it one of the most cost-effective ways to access comprehensive preventive lab data in the US.
The platform delivers maximum value for health-conscious individuals who are motivated by data, comfortable directing their own care, and willing to bring results to a physician for interpretation. For people seeking guided, ongoing medical support, it works best as a complement to, not a replacement for, a care provider.
Is Function Health Legit?
Yes. Function Health is a legitimate healthcare technology company co-founded by Dr. Mark Hyman, a well-credentialed physician, and backed by substantial investor funding with hundreds of thousands of paying members. Its lab partner Quest Diagnostics is the largest clinical laboratory network in the US.
The platform is SOC 2 Type II and HIPAA-aligned, meeting industry standards for data security and health information privacy. Function operates with full regulatory compliance for a healthcare technology company, though it is not itself a licensed medical provider.
Is Function Health FDA Approved?
No. Function Health as a technology platform is not FDA-approved, but the laboratory tests it facilitates are conducted by Quest Diagnostics, a CLIA-certified clinical laboratory that operates under strict federal regulatory standards.
The individual lab tests available through Function are standard clinical assays conducted in certified labs. Function’s role is to aggregate, present, and annotate those results, not to manufacture or perform the testing itself. This is legally distinct from providing medical care.
Where Can You Access Function Health?
Function Health is available online at functionhealth.com and accessible in all US states except New York and New Jersey, with blood draws performed at Quest Diagnostics locations nationwide. No brick-and-mortar Function clinic visits are required.
Members sign up online, complete a health intake form, then schedule their Quest appointment at their convenience. Weekend and early morning slots are available at most Quest locations. Optional advanced MRI and CT scan services are also available through Function at member-only pricing through a separate imaging partner.
How Long Does Function Health Take to Get Results?
Function Health typically delivers lab results within a few days of the blood draw, significantly faster than waiting for a primary care physician to order and follow up on equivalent tests. Clinician notes accompany results on the same dashboard.
The follow-up testing cycle occurs 3-6 months after the initial draw. This timeline gives members sufficient time to make dietary, lifestyle, or supplement changes and then measure whether those interventions moved their biomarkers in the right direction.
Should You Try Eat Proteins for Preventive Health Support?
If Function Health shows you what your biomarkers look like, Eat Proteins shows you what to do about them. Eat Proteins provides evidence-based protein-focused nutrition coaching that directly addresses the metabolic, hormonal, and cardiovascular markers that Function Health tracks. Data is only valuable with action behind it.
Our experts at Eat Proteins work with members to optimize protein intake, reduce insulin resistance markers, and support lean body composition goals that translate directly into improved lab results. Getting your numbers tested is step one. Knowing how to move them is step two.
Why Do Eat Proteins Members See Lasting Results?
Eat Proteins focuses on sustainable protein intake optimization and body composition management, addressing the exact metabolic biomarkers that Function Health members are trying to improve, including glucose, insulin, LDL, and biological age markers.
And this is where it gets interesting: members receive ongoing coaching from our team at Eat Proteins, creating the accountability and expert guidance that Function Health’s data-only model explicitly does not provide. Data without a plan is just numbers. Eat Proteins turns your Function results into lasting change.