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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Cynthia W.
Very easy program to follow. Results exceeded my expectations. Delicious recipes and I never felt hungry. Highly recommend!
Response from Function HealthFeb 16, 2026
Your feedback means the world to us. We’re here to help you unlock a clearer, whole-body view of your health.
Mercedes
I found the whole process excellent. From the blood and urine collection to the care I received during the process. Some of the results were not good for my health, but them were very well explained and the solutions offered were reassuring. Thank you so much.
Response from Function HealthFeb 16, 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.
Beth
Every result was as I expected from my GP testing markers except thyroid which she discounted. I am now pursuing a specialist before things get out of hand. I live in a rural location which required a lengthy drive to have a blood draw but Quest labs were very professional and qualified to find my reluctant veins.
Response from Function HealthFeb 16, 2026
Way to take charge of your health, Beth. We’re glad Function is helping you turn numbers into actionable insights.
MICHAEL
I love Function Health! It’s a great way to be proactive in your goal to be healthy and fit.
Response from Function HealthFeb 16, 2026
Thank you for trusting us with your health. Every review helps more people discover what’s possible with Function.
customer
Function is great. Easy appointment scheduling. Quick and painless blood draws. App works seamlessly. Biomarker data is given valuable context. Results are easily digestible and comprehensively reviewed in plain English. Have not found anything wrong with the service as of yet.
Response from Function HealthFeb 16, 2026
Thank you for trusting us with your health. Every review helps more people discover what’s possible with Function.
Jen R.
I’m sharing this because I wish someone had told me sooner. For months, I knew something wasn’t right. My regular labs kept coming back “normal,” but I didn’t feel normal. This functional health program ran extensive testing not just the basics and uncovered a serious underlying issue that had completely gone undetected. It was both overwhelming and validating at the same time. Overwhelming because it was real. Validating because I finally had answers. Sometimes “normal” labs don’t mean optimal health. Sometimes you need to look deeper. This experience reminded me how important it is to listen to your body and advocate for yourself. I’m so grateful I did.
Response from Function HealthFeb 13, 2026
We appreciate you sharing this, Jen. Reviews like yours inspire others to take the first step toward understanding their health.
Susan
Labs were off from my doctors office . Can’t trust the results. Don’t know if they were mine or someone’s else.
Response from Function HealthFeb 16, 2026
Hi Susan, thank you for sharing your feedback. We hear you and understand how concerning it can feel when results differ. Our team has replied to you via email to help clarify this and provide more context. We appreciate you raising this and giving us the opportunity to look into it.
María del P.
I was expecting that in the follow up exams they include the markers in which we have bad results but not. So in my particular case the follow up was not useful to evaluate my health because I don’t know if my values improve or not for the markers I had bad results in the first exams. And if you want to include the markers you should pay more so at the end I couldn’t see the long term benefit.
Response from Function HealthFeb 16, 2026
We hear you and really appreciate your honesty. Our goal is to make Function as valuable and personalized as possible, and your perspective helps us get there. We’ve sent you an email with more information about how follow-up visits work and how markers are selected. We look forward to connecting there and supporting you further.
