Is Function Health Legit?

As someone who knows how precious health is—and how fast life can get in the way of taking care of it—I’ve learned that regularly monitoring your health data is one of the best ways to stay on top of your well-being. Between family, work, and daily responsibilities, it’s easy to put off preventive care. Sadly, our healthcare system doesn’t make it easier: even basic lab tests can be too expensive, and a primary care physician often doesn’t order them until there are symptoms or concerns.

That’s why I became curious about Function Health, a company co-founded by Dr Mark Hyman and a Function team of medical professionals who believe that knowledge is power. I decided to give their Function Health membership program a try to see if Function Health is worth it and whether it truly delivers on its promise of helping you optimize your health.

In this post, I’ll share my honest experience using Function Health’s services, what my test results revealed, and answer the question “Is Function Health Legit?”.

Is Function Health Legit?

Let’s start with the short answer: yes, Function Health is legit.

It’s a comprehensive and science-based service designed to give you access to an incredibly wide range of lab tests—the kind that most people never get during their routine annual check-ups. The company partners with Quest Diagnostics for lab work, which means your blood and urine samples are analyzed by one of the largest, most trusted diagnostic laboratories in the U.S.

But as with anything in health and wellness, it’s important to look at the bigger picture. So, in this post, I’ll explain what Function Health is, how it works, what they test for, how much it costs, and finally—whether it’s worth it.

What Is Function Health?

To begin with, Function Health is an at-your-fingertips lab testing service that helps you track 100+ key health markers across multiple systems in your body—ranging from hormones and inflammation to liver, kidney, thyroid, and cardiovascular function.

Founded by Dr Mark Hyman and the Function team, the company’s goal is to help people take charge of their health before problems arise. The concept is simple but revolutionary: give individuals direct access to comprehensive health data and help them interpret it in the context of overall wellness.

Once you become a Function Health member, you gain access to annual testing, a detailed results dashboard, and ongoing health insights. The company’s motto, “Know your body, change your future,” aligns perfectly with my own philosophy at I Read Labels For You—empowering people to make informed, proactive choices.

How Does Function Health Work?

To understand better how Function Health works, let me describe the steps I took.

1. Become A Function Health Member

First, I signed up through their website for a Function Health membership, which gave me access to the testing package, a personalized dashboard, and support from the Function Health team.

2. Schedule Your Lab Draw

Second, I scheduled my annual blood and urine tests at a nearby Quest Diagnostics location. I went to the lab twice at specific times in my menstrual cycle. The scheduling process was smooth, even when I needed to reschedule one of my appointments. Everything was handled directly through the Function Health website. At the lab, they drew quite a bit of blood, but both times the technicians did an excellent job—even with my small veins.

3. Get Comprehensive Test Results

Next, a few days after the lab visits, my test results started appearing in my secure Function Health dashboard. The results are organized into the following sections to give you a complete picture of your health:

• Autoimmunity
• Biological age
• Blood
• Electrolytes
• Environmental toxins
• Female health
• Heart
• Immune regulation
• Kidney
• Liver
• Metabolic
• Nutrients
• Pancreas
• Stress & aging
• Thyroid
• Urine

Function Health runs over 100 tests, and some of the results take a bit longer to appear in your dashboard.

4. Track Your Biological Age

Further, one of Function Health’s most fascinating features is its biological age calculator. Based on your biomarkers, it estimates how old your body actually is on a cellular, genetic, and molecular level. My result? 38 years old—even though I’m 50! That means by my biological age I am 12 years younger than by my chronological age, which feels like incredible confirmation that my non-toxic lifestyle is truly paying off.

This result is especially meaningful to me because, at 41, I nearly died when my adrenals stopped producing enough cortisol due to autoimmune damage—a hormone without which the human body simply can’t function. That experience completely changed how I view health and prevention.

In fact, accelerated biological aging increases the risk of nearly every major chronic condition, including prediabetes and type 2 diabetes, cardiovascular disease, cancer, cognitive decline and dementia, kidney failure, hormonal imbalances, muscle and bone loss, autoimmunity, and macular degeneration—all the things I want to avoid. I still remember how frightening it was not having enough energy to stand up, losing my appetite, and trembling from feeling cold because my body could no longer retain heat.

According to Function Health, the main factors that influence our biological age are diet, exercise, environmental toxins, and physical and emotional stress. This perfectly aligns with what I’ve worked on to improve my health since my adrenal crisis. Moreover, I created I Read Labels For You to help you reduce exposure to environmental toxins—without adding the physical or emotional stress that often comes with trying to live a cleaner life.

5. Receive Actionable Insights

Finally, your dashboard will highlight which test results fall within the normal range, as well as those that are above or below it. In addition to that, you’ll receive clinician notes explaining your results and some suggestions. However, it’s important to understand that Function Health doesn’t provide medical care or medical advice—it’s strictly for general information. Instead, it serves as a valuable guide to help you identify which areas to discuss with your primary care physician, preferably someone well-versed in holistic or integrative medicine, or with a functional medicine provider who can help you create a plan of action.

6. Book Follow-Up Tests

Additionally, about three to six months later, you’ll need to schedule more than 60 follow-up lab tests. I haven’t reached that stage yet, but I plan to update this post once I do. The follow-up testing is included in the annual membership.

What Does Function Health Test For?

Overall, Function Health runs an extensive series of lab tests, specifically over 100, that cover virtually every system in the body. The following tests are included in the Function Health membership:

Thyroid function (including TSH, Free T3, Free T4, thyroid peroxidase antibodies, thyroglobulin antibodies)

Hormone levels (estrogen, progesterone, testosterone, DHEA-sulfate, FSH, LH, prolactin, AMH, cortisol)

Cardiovascular markers (total cholesterol, LDL, HDL, LDL medium, LDL small, LDL pattern, LDL particle number, LDL peak number, HDL large particles, non-HDL cholesterol, triglycerides, apolipoprotein B, lipoprotein(a))

Liver and kidney function tests (ALT, AST, ALP, GGT, bilirubin, albumin, total protein, BUN, creatinine, eGFR, urine albumin, electrolytes such as sodium and potassium)

Inflammation and immune regulation markers (hs-CRP, homocysteine, complement C3 and C4, white blood cell differentials including lymphocytes, neutrophils, eosinophils, and monocytes)

Autoimmunity screening (ANA screen, ANA titer and pattern, rheumatoid factor, anti-CCP, ENA panel including Sjögren’s SS-A/SSs-B, Scl-70, RNP, and dsDNA antibodies, plus celiac antibodies)

Nutrient status (vitamin D, vitamin B12, folate, methylmalonic acid, zinc, copper, selenium, magnesium, iron, ferritin, TIBC, % saturation, vitamin A, vitamin E, coenzyme Q10, iodine, chromium, molybdenum)

Blood sugar and insulin sensitivity (glucose, insulin, HbA1c, HOMA-IR, C-peptide, leptin, adiponectin, uric acid)

Fatty acid balance (omega-3 and omega-6 levels and ratios, including arachidonic acid and EPA)

Heavy metals (lead, mercury)

Pancreatic enzymes (amylase, lipase)

Stress and aging biomarkers (cortisol, DHEA-sulfate, biological age calculation)

Complete blood count and electrolytes (RBC, WBC, hemoglobin, hematocrit, platelets, sodium, potassium, calcium, chloride, phosphorus)

Urinalysis (glucose, protein, pH, sediment, and appearance)

In addition to the included tests, Function Health also offers many other specialized tests for an additional fee. Moreover, they provide whole-body scans designed to give you an even deeper look at your overall health. You can find the complete list of tests available on their website.

My Results

In my own results, I was especially happy to see no thyroid antibodies and no autoimmunity markers, which confirmed that my body is currently free from active autoimmune reactions—something deeply meaningful to me after experiencing autoimmune conditions in the past that caused both Hashimoto’s and Addison’s diseases.

Is Function Health Worth It?

In my opinion, yes— Function Health’s services are absolutely worth it, especially if you care about prevention, optimization, and making data-driven health decisions.

Here’s what I liked most about my experience:

• Firstly, the process was seamless and professional from start to finish.
• Secondly, the lab draws at Quest Diagnostics were quick and convenient.
• Thirdly, the online dashboard presentation of my health data is intuitive, organized, and easy to understand.
• Additionally, I was able to download my test results and, with the help of my medical providers, identify both strengths and areas for improvement, as well as plan the next steps.
• Moreover, I would never have had the opportunity to access so many comprehensive tests elsewhere for such an incredible price—only $499 a year.

Overall, for someone like me—who already leads a health-conscious lifestyle and values the data behind every choice—Function Health offered remarkable insight. It’s not a substitute for medical care or medical advice, but rather an empowering complement to it.

If you’ve ever felt like your doctor doesn’t have enough time to go deep into your labs or only orders the most basic panels, this service can be a true game changer.

How Much Does Function Health Cost?

As of now, the Function Health membership costs $499 per year, which includes your initial 100+ biomarker panel as well as over 60 biomarkers at mid-year. Some additional optional tests may come with extra fees, but the base membership covers a very broad range.

When you consider that ordering all those lab tests individually through traditional medical channels could easily cost thousands of dollars, the value is significant. Plus, you get lifetime access to your results through your dashboard, allowing you to compare future data year over year.

Function Health also offers ongoing analysis, meaning you can retest annually and track your improvements over time—an approach that aligns beautifully with the philosophy of prevention and progress.

Conclusion: Is Function Health Legit?

Absolutely! Function Health’s Services Are An Excellent Choice For Anyone Who Values Prevention, Early Detection, And A Data-Driven Approach To Wellness.

In conclusion, if you’ve ever wanted to understand your body on a deeper level, Function Health makes that possible in a clear, organized, and affordable way. My personal journey—discovering that my biological age is 38, that I have no thyroid antibodies, and that I’m thriving after years of autoimmune recovery—has been both validating and inspiring. In fact, I value Function Health’s services so much that I’m planning to remain an active member of their service and referral program for years to come. 

By combining modern diagnostics with a proactive mindset, we can truly take control of our health trajectories. I’ll continue to use Function Health as a cornerstone of my annual check-ups, alongside other wellness practices such as red light therapy for inflammation, good nutrition, non-toxic products, daily exercise, and stress management.

Disclaimer: This post is based on my personal experience and is provided strictly for general information purposes. It is not intended to be a substitute for medical care or medical advice. Always consult your qualified healthcare provider with any questions about your health or before making any changes to your medical routine.