Jon R.
Good information
Good information, easy to test, and good follow-up.
Response from Function HealthJan 2, 2026
Thank you for trusting us with your health, Jon. Every review helps more people discover what’s possible with Function.

Function 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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Jon R.
Good information, easy to test, and good follow-up.
Response from Function HealthJan 2, 2026
Thank you for trusting us with your health, Jon. Every review helps more people discover what’s possible with Function.
Brigitte G.
I had a question after my blood draw and sent an email that was quickly answered. The support with my Function membership is one of the things that really stands out for me.
Response from Function HealthJan 2, 2026
So glad to hear you’re enjoying Function, Brigette. We’re excited to keep supporting you with insights that matter most to your health.
Deborah J.
I think there are a few flaws in the system still, maybe due to the novelty of the experience. My supplements differ information from my tests and my food suggestions as far as consumption of iron and iron loaded foods. Also, my second set of tests didn’t reflect on my already set results. A few important tests aren’t being offered ( estrone, for instance). I would like to see improvement when suggesting supplements as far as maybe brands and especially amounts ( because the suggested in the bottles aren’t for optimal health) and when they are to be taken ( Ex: AM. PM, with food, far from meals, etc.). Overall if I take all the lab results and suggestions to Chat GPT and have it analyze them, I have a more adjusted plan than the generic one suggested. Still I am very happy with the availability of all these tests and biomarkers being done at a fraction of the price I was paying before out of my pocket!
Response from Function HealthJan 2, 2026
Thank you for taking the time to share your experience. We’re always learning from our members and will use your feedback to keep improving.
Barbara M.
The older I get, the more focused I am on prevention. Function Health helps me plan for a healthy future. Knowing what's going on inside of my body is critical to preventative medicine.
Response from Function HealthFeb 11, 2026
We appreciate you sharing this, Barbara. Reviews like yours inspire others to take the first step toward understanding their health.
Marlana G.
This has been the best experience of my life!!! I have been trying to eat clean and exercise for over 40 years, yet my numbers have been bad. I even tried an independent lab. I found Function Health through Casey Means book, Good Energy. I finally understood what actually was the problem. With Function Health's directives, my numbers have improved drastically. I am still working on some issues, but am hopeful in continuing the process.
Response from Function HealthFeb 11, 2026
Thank you for sharing your story, Marlana. We’re so happy to hear Function helped you uncover the “why” behind your numbers and make real progress toward better health.
Ann K.
I love being in control of my health including need for additional lab testing without going through my physician. Cost is very affordable, if going through a functional practioner the cost for varied labs would be phenomenal. The platform has improved over the past 3 years and provides valuable feedback on dietary changes, concerns, supplements provided by a functional medicine MD. I have recommended to multiple friends; the feedback is so valuable.
Response from Function HealthFeb 11, 2026
We’re thrilled you’re finding value in Function, Ann. Our mission is to empower members like you to understand and take charge of their health.
Jlaud
The communication in the beginning was great. When the appointments would be, how to schedule etc. I felt it fell short in the area of suggested vitamins and what to eat. What dose of the vitamins? I liked how it gave the top five in each category and you could click and find out why. Also are there any results that when they are out of range together mean anything? And when I did the original blood work you may want to mention that one of them is a urine test (the tech didn't notice and just drew blood for all) so I had to go back and do that test later that pushed the summary back by a few weeks.
Response from Function HealthFeb 11, 2026
Thank you for taking the time to share your experience, Jlaud. We’re always learning from our members and will use your feedback to keep improving.
Durwood H.
Appreciate the explanation of the results and the needed recommendations.
Response from Function HealthFeb 11, 2026
Thanks for sharing, Durwood. We’re glad to hear you found the results and recommendations helpful in understanding your health. Way to take proactive steps toward feeling your best 🧡