Frequently Asked Questions

No, you don't have to worry about that. Your lab tests are ordered and reviewed by licensed physicians.

Using older lab tests to understand your current health is typically not recommended, as your health is ever-changing. Function offers comprehensive lab testing that makes it easy to understand your current health status. Function also compares your most recent results with past results to reveal trends.

Function includes 5x more lab tests than most primary care check-ups. This includes heart, thyroid, hormones, metabolic, kidneys, liver, nutrients, heavy metals and more. Function also tracks your results over time and brings you actionable insights from the world’s top doctors based on your specific results. All lab tests are ordered and reviewed by licensed physicians.

You will be tested at one of over 2,000 locations across the US, within 10 miles of nearly every home in the United States. Our lab partner performs over 50 million tests per year and is trusted by the entire medical community. Lab visits are not currently available in New York, New Jersey, Rhode Island, Hawaii or Puerto Rico.

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Note that lab visits in Connecticut ($96) and Massachusetts ($240) have a state surcharge.

It’s easy. After signing up for Function Health, you will receive an email and text message to schedule a convenient time and location for your lab visit. You will be tested at one of over 2,000 locations nationwide, within 10 miles of nearly every home in the United States.

An average lab visit takes 15 to 30 minutes, as long as you are on time. Your first set of tests each year may require two lab visits to complete all tests.

Your first set of tests looks at over 100 biomarkers, from heart and hormones to liver and heavy metals. Usually, only 35mL of blood is drawn at one time, which is why your set of tests may be split into two lab visits. For context, a blood donation is 14x more at ~500mL.

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‍Pro tip: Being extra hydrated improves blood flow and may make your blood test quicker. We encourage you to book your two lab visits within the same week for consistency in your results.

At least twice a year. Your Function membership includes:

• 100+ lab tests to start each year of membership. No hidden cost. No insurance involved.
• 60+ lab tests ~6 months later to check in.
• Access to re-test anytime at a low cost.
• Access to purchase non-routine tests (e.g. lyme, STDs, allergies) anytime.
• Access to try the latest developments in testing (e.g. Multi-Cancer Early Detection).

Testing your body's function every six months can help you understand how it is functioning over time. By monitoring changes across specific intervals, it becomes easier to understand where your health may be headed.

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Knowing your body in this way gives you the power to positively influence your health's future. Most of the time, a lab test only looks at a single point in time. Comparing your results over time creates a whole new set of invaluable data, allowing you to set a personal baseline. Ongoing testing and iterative changes in your daily life are the new standards for taking ownership of your ever-changing health.

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With a Function membership, you can benefit from 100+ tests once a year and another 60+ tests six months later, as well as access to re-test anytime.

Tests are performed by professional phlebotomists who are likely used to working with people who have fainted in the past. Let your phlebotomist know if you have had a history of fainting. Note that blood draws are safe and carry little to no risk.

No. The large number of tests included with your Function membership would not work via self-collect, at-home kits. We explored using these mail-in kits for single tests but concluded that they would be too unreliable, due to ongoing issues with improper finger pricks and instructions-adherence that could interfere with specimen integrity, specimen size, temperature control, ambient particle exposure, time delay, and human tissue damage.

At this time, we do not offer access to testing for those who are pregnant because many results may be affected by pregnancy.

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We are here for you post pregnancy. For those post pregnancy, you can be tested with Function after two menstrual cycles.

It is required that you fast for 8 hours before most tests. It is also strongly recommended to be well-hydrated to ensure easier blood draws and the most accurate urinalysis. If you do not fast, some of your biomarkers will be skewed. We also recommend a morning test for the most accurate results related to hormones such as testosterone and cortisol.

It is recommended that you do not discontinue any medication without discussing with a doctor first.

It is suggested that you avoid consuming seafood 7 days prior to any test that looks for heavy metals like mercury, which is included with Function membership.

Biotin (Vitamin B7) may affect results for the following tests: Testosterone, Cortisol, Thyroid Stimulating Hormone, T3, T4, Follicle Stimulating Hormone, Estradiol, and Luteinizing Hormone. Some choose to stop taking biotin 72 hours prior to testing.

All tests are processed in CLIA and CAP certified labs widely trusted by the medical community. Your blood and urine samples are collected by licensed medical technicians on-site and processed with state-of-the-art equipment. This is the safest and most accurate way to be tested given the advanced processing needs for the wide range of tests in which Function gives you access.

We do not offer access to one-time, on-demand testing. Function membership includes comprehensive testing, and members have the ability to re-test any individual tests when necessary. While healthcare often isolates issues to single aspects and treats the symptoms rather than addressing the root cause of issues, Function was created to provide a complete perspective of what is actually happening inside your body. We don't want you to miss a thing.

Once a set of lab tests has been scheduled, we are unable to make any changes to it. However, as a member, it is easy to re-test any biomarker at any time. If there is enough time between your visit and the new test(s) being ordered, they may be run at the same time as your scheduled test.

No, Function does not diagnose at this time. Although the lab tests included with your Function membership are the same as those trusted by the broader medical community, and a doctor is reviewing your lab test results, diagnoses are not yet available through Function.

Your body is ever-changing. Your eating, sleeping, stress and outdoor exposure all impact your body. Regular testing allows you to understand how your health is changing and therefore what you can do to improve it.

Function memberships includes a complete set of biomarkers related to fertility, and many more that can directly impact fertility. However, you will need to work with your doctor to determine your fertility based on your results.

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Note, if you are on hormonal birth control, some fertility markers are not tested, given birth control is likely to greatly skew results.

Function includes lab tests that measure the primary fertility hormones in women and men. These are critical for those trying to conceive. See the list here. You will need to work with your doctor to discuss your fertility based on your results.

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Note, if you are on hormonal birth control, some fertility markers are not tested, given birth control's propensity to greatly skew results.

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If you have a regular period, you will have to get tested on day 3 of your cycle for the most optimal result.

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Beyond the obvious tests directly related to fertility, other tests that are part of your Function membership can impact decisions around conceiving, including heavy metal toxicities.

Yes. Your Function membership gives you easy access to the new Galleri test by Grail. In partnership with Grail, the Galleri® multi-cancer early detection test detects cancer signals across 50+ types of cancer as early as stage one. It is often run annually, and currently costs an additional $899. Once you are a member, you will be offered this test as an addition to each lab visit.

Function includes nearly all hormone related tests, like Thyroid Stimulating Hormone (TSH), Triiodothyronine (T3) Free, Thyroxine (T4) Free, Anti-Müllerian Hormone (AMH), and more.

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The tests excluded are Follicle Stimulating Hormone (FSH), Estradiol, and Luteinizing Hormone (LH) because hormonal birth control may skew results.

88% of Americans are metabolically unhealthy (UNC, 2018). Function gives access to a broad range of lab tests that help measure metabolic fitness.

Function is at war with heart disease, the leading cause of American deaths, and goes deep on your cardiac health. A recent study showed that nearly 75 percent of patients hospitalized for a heart attack had cholesterol levels that would indicate they were not at high risk for a cardiovascular event, based on current national cholesterol guidelines. Your membership includes the traditional lipid panel, but goes so much further with advanced tests like Lipoprotein A, Apolipoprotein B, and Lipoprotein Particle Size. Most cardiologists today agree that traditional lipid panels are an incomplete way to monitor your cardiac health.

Yes. Function includes a complete set of thyroid tests. See the full list here.

Yes. Function includes testing mercury and lead. Additional heavy metals, like arsenic and aluminum, are available on-demand. See the full list here.

Function gives you on-demand access to test the Apolipoprotein E (ApoE) genotype, which indicates one’s risk of Alzheimer's disease.

Yes. Function gives you access to allergy testing across a wide spectrum of foods, including dairy and gluten, and indoor and outdoor allergies as well. Full list of tests here.

Yes. Function gives you access to low-cost sexual health testing via the on-demand test menu.

Function includes tests that can help illuminate the role of vitamins, minerals, and toxins on your well-being and the imbalances that can sometimes contribute to depression, anxiety, brain fog, insomnia, attention deficits, mood swings, and more.

Science is still learning about how COVID effects your body. Function offers a deep look into the current state of your health. This is helpful for identifying issues that may have arisen recently. It also tracks both current and past results to show you how your body is changing over time. With all viral infections and vaccinations, there is the possibility of an immune response and a resulting increase in inflammation. This means that you could experience temporary elevations in your inflammation markers (e.g. hs-CRP) and white blood cell count. Therefore, it is common to wait two weeks after vaccination before a test. Note: the degree of these immune responses varies between individuals.

Around 3-5 weeks. Often sooner. Some tests require complex processing that can take more time than a basic test. We know how important this information is and we are always working to expedite your results. If you’ve completed your lab visit(s) and are waiting on results, feel free to email support@functionhealth.com for a status update.

Your test results include explanations and insights specifically relevant to your unique results. This information is sourced from a diverse group of the world's top doctors, including Function's Chief Medical Officer, Dr. Mark Hyman MD. All information is derived from published, peer-reviewed scientific studies from the NIH, JAMA, NEJM, and other reputable sources. Every round of test results is also reviewed by physicians, and their write-ups are included when you receive your results.

Yes, licensed doctors both authorize your tests and review every result. A doctor's opinion is provided to you along with your results.

Yes. You can download a results PDF to share with a doctor. You will see this when you login after your test results have arrived.

Yes. We always provide you with a PDF from the performing laboratory. You can share this with doctors or loved ones anytime.

A healthcare provider will call you immediately if there is a critical result.

On rare occasions, lab tests can have errors. This is true for any diagnostic test.

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If results are abnormal because you forget to fast or don’t hydrate properly, this does not necessarily mean they are erroneous. Instead, it likely reflects a value outside of your normal range due to the circumstances.

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Abnormalities are just one reason why Function members establish a baseline. By going beyond a single snapshot and identifying trends, you can better understand the story of your body and create a healthier future for yourself.

As with any diagnostic test, false positives and false negatives may occur. If you or your doctor suspect a false result, you may purchase a re-test.

Function aims to apply machine learning algorithms to your lab test results over time, in order to uncover things that humans are likely to miss. This may include analyzing millions of combinations of your data to reveal early warning signs of disease, causal relationships, and hidden trends.

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The medical community typically only performs comprehensive tests when they suspect something is wrong, which means that there is limited data available at random intervals. This has made it difficult to meaningfully apply artificial intelligence to diagnostics and make health predictions. Most insights right now come from averages across large populations. However, with Function, you can build a long-term dataset of your unique health that can unlock a new level of intelligence specifically about you. The longer you test, the greater the insights will become.

Not yet. Stay tuned.

The $499 per year Function membership includes:

• 100+ lab tests to start each year of membership. No hidden cost. No insurance involved.
• 60+ lab tests ~6 months later to check in.
• Insights from top doctors based on your results.
• Access to re-test at a low cost anytime.
• Access to purchase non-routine tests (e.g. lyme, STDs, allergies) anytime.
• Access to try the latest developments in diagnostics (e.g. Multi-Cancer Early Detection).

After your first test, you will receive a dashboard that securely displays your lab tests results over time. The dashboard also includes specific insights from top doctors based on your results. It is designed to help you understand your body and learn what the right decisions are to make for your health. This is also where future Artificial Intelligence and Machine Learning features will exist.

Function provides you with access to purchase a re-test for any biomarker you need. Text your concierge to schedule it. If you have access to the dashboard, login and click "Get New Test" to select the test(s) you wish to receive.

We are currently in beta and plan to launch to the public soon.

Join our waitlist here. If you have a friend who is already a Function member, ask for one of their invites.

Check your email. If you don't see invites for friends, email hello@functionhealth.com.

Yes. As a Function member, you will receive an email with 3 invite codes to give your friends and family early access.

We do not currently offer shareable memberships. Members receive three invites to join Function's early access, which you can give to your partner.

If you are interested in working with Function as an affiliate, email affiliate@functionhealth.com.

Email hello@functionhealth.com with your request.

Function is an insurance-free membership. Insurance reimbursement is not an option.

Go to our Contact Us page to get in touch.

Cancel anytime. Email hello@functionhealth.com to cancel.

You can cancel your Function annual membership anytime. Function does not offer refunds for prior payments.

Yes. Function helps unlock, translate and organize your biological data. We think that information about your health is the most valuable data in the world to you. This is entirely your data and nobody else’s, including ours. You can opt to delete your data anytime you wish. Please know that by deleting it, we will not be able to recover it should you change your mind.

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Function Health is HIPAA compliant and we take privacy extremely seriously. We use a range of the latest technical security tools and administrative measures to safeguard your data against unauthorized access or disclosure. Note that Function Health cannot secure personal data that you release on your own or that you request us to release, so we recommend considering with whom you choose share this data. Read our Privacy Statement.

Yes. Function helps unlock, translate and organize your biological data. We think that information about your health is the most valuable data in the world to you. This is entirely your data and nobody else’s, including ours. You can opt to delete your data anytime you wish. Please know that by deleting it, we will not be able to recover it should you change your mind.

You, the laboratory, doctors and administrators. Doctors and laboratories must report certain test results to state health authorities for disease tracking and prevalence.

We love working with anyone who helps others with their health. Function makes it easy for people to intentionally share their health data with providers and practitioners. If you are interested in gaining access, please enter your contact information here and we will be in touch soon.

Function is here to help keep your employees healthy. Learn more here.

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