If you are interested in preventive healthcare, longevity, and understanding your health beyond a standard annual physical, you may have come across Function Health.
Function Health is a U.S.-based health membership platform designed around extensive laboratory testing, clinician-reviewed results, longitudinal health tracking, and personalized health insights. Rather than waiting for symptoms to appear, the service is built around regularly measuring a broad range of biomarkers and watching how they change over time.
But is Function Health actually worth the money? Does testing more biomarkers automatically mean better healthcare? And how does the service compare with a traditional annual checkup?
This Function Health review looks at the membership, testing process, pricing, benefits, limitations, and who may find the service useful.
Note: This is an informational review, not medical advice. Having an abnormal laboratory result does not necessarily mean that you have a disease, and medical decisions should be discussed with a qualified healthcare professional.
What Is Function Health?
Function Health is a membership-based preventive healthcare platform that combines laboratory testing with health data tracking and clinician-reviewed insights.
According to Function, its membership currently includes 160+ lab tests annually, with testing performed at least twice per year. The initial testing includes more than 100 biomarkers, followed by 60+ tests several months later to help track changes. (Function Health)
The company describes its approach as a way to develop a broader picture of someone’s health rather than relying only on the relatively limited bloodwork commonly performed during a routine physical.
The testing covers areas such as:
- Heart and cardiovascular health
- Metabolic health
- Thyroid
- Hormones
- Liver
- Kidneys
- Nutrients
- Inflammation
- Autoimmunity
- Environmental toxins and heavy metals
- Blood health
- Pancreas
- Electrolytes
- Sexual health
- Bone health
- Infections
- Other health-related biomarkers
Function also offers additional testing and imaging options, including MRI and CT scans, for an additional cost. (Function Health)
How Does Function Health Work?
The Function experience can broadly be divided into four stages.
1. Complete your health information
After joining, members provide health information that Function uses to put laboratory results into context.
The idea is not simply to provide a spreadsheet of numbers. Function says its clinicians review results along with the member’s health history and provide explanations and recommendations. (Function Health)
2. Complete your laboratory testing
Members schedule their laboratory appointment through Function.
Function currently says its testing is available through more than 2,000 Quest Diagnostics locations nationwide in the United States. The company states that a typical laboratory visit takes around 15 minutes. (Function Health)
The initial testing covers 100+ biomarkers.
Instead of stopping there, Function’s model includes another round of testing during the year, allowing members to compare results over time.
3. Review your results
After the tests are completed, results become available through the Function platform.
The company says clinicians review results and provide explanations, including notes when results fall outside expected ranges. Function also provides personalized health recommendations and educational information. (Function Health)
4. Track changes over time
This is arguably one of the more interesting aspects of Function.
A single blood test provides information about your health at one point in time. Function’s approach is based on repeated measurements.
For example, instead of simply knowing your cholesterol level today, you can potentially observe whether a biomarker has changed between testing periods.
Function recommends retesting every 3–6 months, with 60+ tests included in the mid-year testing. (Function Health)
What Tests Does Function Health Include?
One of the biggest selling points of Function is the breadth of its laboratory panel.
The company currently advertises more than 160 tests per year. (Function Health)
Some of the areas covered include cardiovascular biomarkers such as Apolipoprotein B (ApoB), Lipoprotein(a), HDL-related measurements and high-sensitivity C-reactive protein (hs-CRP). (Function Health)
It also includes testing related to thyroid function, metabolism, nutrients, liver function, kidney function, inflammation, autoimmunity and environmental exposures.
Function specifically highlights heavy-metal testing such as lead and mercury as part of the membership, while other tests can be available as add-ons. (Function Health)
The broad testing approach can be particularly interesting for people who want more information than they typically receive from a standard checkup.
However, there is an important distinction:
More testing does not necessarily mean better healthcare for every person.
Laboratory testing should be interpreted in the context of symptoms, medical history, family history, medications, age and other factors. A broader test panel can also produce results that require additional interpretation or follow-up.
Therefore, Function is best viewed as a source of additional health information rather than a replacement for a primary-care physician or specialist.
Function Health Pricing
Function has changed its pricing over time.
As of the information currently published by the company, the standard membership is advertised at $365 per year. Function describes this as approximately $1 per day. (Function Health)
The membership includes:
- 160+ laboratory tests annually
- Testing twice per year
- Access to health insights
- Clinician-reviewed results
- Longitudinal health tracking
- Personalized health information
- On-demand testing options at additional member pricing
- Access to additional MRI and CT options at additional cost
Function’s website also states that its membership may be eligible for HSA/FSA reimbursement, although eligibility depends on the individual’s plan and circumstances. (Function Health)
Because pricing and promotions can change, prospective members should verify the current price directly before purchasing.
View Function Health’s current pricing
What I Like About Function Health
1. The amount of information is substantial
The biggest attraction is clearly the breadth of testing.
Many people receive relatively basic bloodwork during routine physicals. Function attempts to provide a much broader collection of biomarkers.
For someone who enjoys tracking health metrics, this can provide significantly more information.
2. Testing is repeated
The second major advantage is longitudinal tracking.
Rather than looking at a single laboratory result, Function encourages members to look at trends.
This can be useful because changes over time may provide more context than one isolated measurement.
3. Results are stored in one place
Function is designed to keep health information together in one platform.
That can make it easier to review previous results and observe changes.
The company says members can download and share their results with healthcare professionals. (Function Health)
4. Clinician review adds context
A major potential advantage over simply purchasing laboratory tests independently is the interpretation layer.
Function says clinicians review results and flag issues that may require attention. (Function Health)
This can make extensive laboratory data easier for a non-medical person to understand.
5. Additional testing options
Members can purchase additional laboratory tests and access advanced imaging options.
Function currently lists MRI and CT options separately from the standard membership. (Function Health)
This creates a broader health-monitoring ecosystem for people who want to use it.
Potential Downsides of Function Health
No health service is perfect, and Function has several limitations worth considering.
1. It is currently U.S.-focused
This is an important consideration for international users.
Function’s laboratory network is centered around Quest Diagnostics locations in the United States. The company currently describes access through more than 2,000 Quest locations nationwide. (Function Health)
Therefore, someone living outside the United States should verify eligibility and testing availability before purchasing.
2. More information can sometimes create more questions
Getting 160+ tests sounds impressive, but interpreting a large number of biomarkers can be complicated.
An abnormal result does not automatically mean that something is seriously wrong.
Conversely, a normal result does not guarantee that a person is completely healthy.
This is why laboratory results should be interpreted within the broader clinical context.
3. Some services cost extra
The membership doesn’t mean that every possible test or scan is included.
Function offers additional tests and imaging separately, including options such as MRI and CT scans. (Function Health)
Someone who wants to use many add-ons could therefore spend substantially more than the basic annual membership price.
4. It doesn’t replace traditional healthcare
Function is designed around health monitoring and preventive information.
It isn’t a substitute for emergency medical care, a primary-care physician, specialist treatment, or diagnosis and treatment of an existing medical condition.
If someone has symptoms or receives a concerning test result, appropriate medical follow-up remains important.
What Do Customers Say About Function Health?
Online customer feedback is mixed, as is common with subscription healthcare services.
At the time of this review, Function’s Trustpilot page displays an overall score of 4.5 out of 5 based on roughly 3,000 reviews. Trustpilot also shows that the distribution includes both highly positive and critical reviews. (Trustpilot)
Positive feedback frequently focuses on the amount of testing, the convenience of having results organized in one place, and the explanations associated with laboratory results.
Some negative feedback focuses on individual testing experiences and expectations around which tests are repeated during follow-up testing.
Customer-review platforms should be treated as anecdotal evidence rather than clinical evidence. Individual experiences can vary considerably.
Function Health vs. a Traditional Annual Physical
The biggest difference is the philosophy behind the two approaches.
A traditional physical generally focuses on clinically appropriate screening based on a person’s age, medical history, risk factors and symptoms.
Function takes a broader biomarker-monitoring approach.
| Feature | Function Health | Traditional Physical |
|---|---|---|
| Broad laboratory testing | Yes | Varies |
| Repeated testing | Included | Depends on physician |
| Long-term biomarker tracking | Yes | Varies |
| Clinician interpretation | Yes | Yes |
| Advanced imaging | Available as add-on | Usually separate |
| Insurance required | No | Often involved |
| Primary-care relationship | Not necessarily | Usually |
| Emergency care | No | No |
| Disease treatment | Not its primary purpose | Yes, when appropriate |
The two approaches don’t necessarily have to compete.
For some people, a preventive health platform can complement their existing healthcare rather than replace it.
Who Is Function Health Best Suited For?
Function may be particularly interesting to people who:
- Enjoy tracking health metrics
- Want broader laboratory testing
- Are interested in preventive healthcare
- Want to monitor biomarkers over time
- Prefer having health data organized digitally
- Are comfortable paying out of pocket
- Want additional information to discuss with their doctor
- Live in an area where Function’s testing network is available
On the other hand, someone who rarely reviews health metrics or already receives appropriate comprehensive testing through their healthcare provider may find less additional value.
Is Function Health Worth It?
Whether Function Health is worth the annual membership depends heavily on what you expect from it.
At its current advertised $365 annual membership price, the platform provides a large number of laboratory tests and repeated testing throughout the year. (Function Health)
Its strongest differentiator is not simply the number of tests. It is the combination of broad testing + repeated measurements + clinician review + centralized health tracking.
However, users should avoid assuming that more biomarkers automatically translate into better health outcomes. The usefulness of any test depends on the individual and how the information is interpreted and acted upon.
For someone interested in proactive health monitoring, Function offers an interesting model. For someone looking primarily for diagnosis or treatment of a current medical problem, conventional healthcare remains essential.
Final Verdict
Function Health is an ambitious attempt to make preventive health data more comprehensive and easier to understand.
The platform combines 160+ annual laboratory tests, twice-yearly testing, clinician-reviewed insights and longitudinal tracking in a single membership. (Function Health)
Its current $365/year pricing also makes the service considerably less expensive than some concierge-style healthcare programs, although additional tests and imaging can increase the total cost. (Function Health)
The biggest consideration is not whether Function can produce a lot of health data—it clearly can—but whether you will use that information appropriately and discuss meaningful findings with qualified healthcare professionals.
For people interested in preventive health, longevity and detailed biomarker tracking, Function Health is a service worth researching further. For everyone else, the value will depend on personal healthcare needs, access to testing, and how much additional health information they actually want to manage.
