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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Nils
Function is one of the best services I've used. It's a more comprehensive panel than I got at Mayo clinic and covered what I wanted. The ease of rebooking follow on exams allowed me to focus on improvement across markers and track them in one place. Removing the friction of a doctor and speed of results was motivating for me. I upload screenshots of results to ChatGPT for analysis.
Mark H.
Although results on a few tests came back only after a long wait, the results are helpful and the explanations of why each element is important are clear and sufficiently complete. Some food recommendations are too generic and occasionally do not seem appropriate to the test with which they are associated. Add-ons are too expensive as a la carte - should offer bundled discounts (since based on one or a few draws).
Christina
The app is great, the whole concept of tracking biomarkers is game-changing, and the times I needed customer service they were quick, thorough, kind and helpful. I've had the service for two years and have been so happy.
Stephenie C.
Customer Service is very quick to reply to all my questions
M M.
Very smooth, very glad to get the morning text as that woke me up!
Ron D.
Awesome experience!!! It gave me great insights into my overall health status. I can now adjust some things to optimize my numbers. My doctor wouldn't approve any of these tests and now I can't wait to show him how valuable they are. I prefer to be in control of my own health rather than delegating it out to the sick care industrial complex.
Kim B.
Function allowed me to confirm that what I’d been doing to stay healthy was the correct path. It also gave me insight about inflammation that I wasn’t aware of and autoimmune issues that needed addressing. I was surprised with my metabolic age showing my body age is 13 years younger than my birth certificate!!
JULIE
I love the quick responses when I have questions (via the app). I love how easy the appt is to navigate. My favorite part about the website/app is that when you click on the foods and supplements, it actually informs you what it helps improve!
