Function HealthFunction gives you access to 160+ yearly lab tests—5x more than a typical annual physical—covering everything from heart, hormones, thyroid, liver, kidneys, heavy metals, nutrients, inflammation, and more, plus actionable insights from top doctors. All results are stored in one place, making it easy to spot trends, track progress, and take action.
Function Health (functionhealth.com) has 3,039 customer reviews on Five Star Index, with an average rating of 4.4 out of 5.
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Felicity J.
I used Function Health for their wellness service and I'm impressed. The staff were friendly, knowledgeable, and took time to explain everything. My sessions felt really personalized, and I saw real improvement. it was a professional and caring experience.
Response from Function HealthJan 2, 2026
We’re thrilled you’re finding value in Function. Our mission is to empower members like you to understand and take charge of their health.
Jenny B.
I’m very unhappy with the turnaround time for my very simple labs. I received results for the same test the very next day from a different Discount lab company and my labs are still held hostage by Function health. After multiple requests.
Response from Function HealthNov 27, 2025
Thank you for sharing your feedback. We’re truly sorry to hear about your experience and appreciate you taking the time to let us know. We’ve reached out to you directly so we can take a closer look and assist you.
Adam G.
Product is okay but has super shady business practices. You have to fill out this long form to cancel. They send no confirmation, so you have no receipts. I first canceled months ago and received a full refund. Then they rebilled a few months later. I flagged it the same day, and the billing is refusing to refund me. It's completely mad, but what can you expect from a soulless VC-backed data harvesting med tech companies?
Response from Function HealthNov 27, 2025
Hi Adam, we’re sorry for the frustration this caused and appreciate your patience as our team worked through a higher-than-usual volume of inquiries. Our team has connected with you directly via email, and confirmed your refund has been processed in full.
Pat
This is a great opportunity to get a handle on your health and any issues you may be encountering. They discovered several issues in my blood work that no one addressed. But then they cannot help you beyond that. You have to find someone else to help you. My traditional doctor (MI) and my functional medicine doctor (TN) wanted nothing to do with that. They didn't even look at the blood work.I left for them. I switched to a dietician & cleveland clinic, and they are helping me based find my function health test results. I am doing much better now.
Response from Function HealthNov 25, 2025
Thank you for sharing your experience. We’re glad the testing helped uncover important insights and that you were able to find the support you needed. Your feedback is helpful as we continue improving how members can use their results alongside their care teams.
Julie F.
Ease of scheduling, detailed results and notes.
Response from Function HealthNov 25, 2025
We’re thrilled you’re finding value in Function. Our mission is to empower members like you to understand and take charge of their health.
Meerdutch 7.
I hate services like this. They make it super easy to signup but make you jump through hoops to cancel. I recenlt purchase a subscription have reading through all the testing the service offers. However, many of the test do not come with the subscription and are offered at addtional cost. This is understandable, but they do not make that clear on the main page. After realizing this 10 minutes after signing up, i decided to cancel. This is where the it gets infuriating and they make you jump through hoops. The only way to cancel it to go through their stupid chatbot or wait days for your email to be answered by a representative. Then they make you answer a long questionaire of why you want to quit the service and force you to look through additional offers. Even after all of the crap and contacting support a number of times,7 days later I still haven't gotten a confirmation of my cancellation or refund. Don't use this service!!!!!
Response from Function HealthNov 26, 2025
We’re sorry for the frustration you experienced during the cancellation process and your patience as our team worked through a higher-than-usual volume of inquiries this past week. Membership includes the cost of over 100 lab tests at the start of each year of membership and 60 lab tests around 6 months later. It also includes access to additional testing like robust cancer and Alzheimer’s detection at special member pricing. As requested, your membership has been canceled and a full refund processed.
Raving F.
If you desire to take proactive control of understanding your metabolic health and improving your health expectancy, then Function Health is a Giant Leap toward taking proactive, functional control of your metabolic future.
Response from Function HealthJan 13, 2026
Thank you for sharing your experience. We’re glad to hear that Function Health has supported you in taking a proactive approach to understanding and improving your metabolic health. Empowering members to take control of their long-term wellness is exactly what we aim to do, and we appreciate your thoughtful feedback.
Mila
Making me go a third day for 1 test was unnecessary according to the Quest lab tech that took my blood. Billing is a nightmare and Quest is taking me to collections soon because Function Health is not getting it straightened out, even though tons of email communications promise to work it out with Quest. I really resent paying up front with your company, then getting billed by Quest for the lab work. There is a lot of administrative dysfunction that has caused me a lot of stress and hassle. Very unhappy,
Response from Function HealthNov 21, 2025
Hi Mila, we’re sorry for the frustration this caused. Our team has emailed you so we can assist you directly and work through the issues with Quest.
