Function Health has become one of the most talked-about names in preventive health testing, and the Function Health reviews reflect that split: people either love how much data they get back, or they balk at the price tag once the novelty wears off. Here’s what the service actually offers and where opinions tend to diverge.
What Function Health Is
Function Health is a membership-based lab testing platform founded in 2021 by Dr. Mark Hyman along with Jonathan Swerdlin, Daniel Swerdlin, Pranitha Patil, Mike Nemke, and Seth Weisfeld. It’s headquartered in Austin, Texas, and has grown quickly enough to raise a $298 million Series B round that valued the company at $2.5 billion in late 2025. The pitch is simple: instead of the roughly two dozen markers checked at a typical annual physical, members get access to 160+ lab tests a year, split across two draws, run through Quest Diagnostics rather than an at-home kit.
The first visit covers 100+ biomarkers spanning heart health, thyroid, hormones, liver and kidney function, nutrients, inflammation, and cancer signals. A second draw three to six months later adds another 60 or so markers to track how things have changed. Every result comes with a clinician-written summary, and if something comes back urgent, a clinician reaches out directly rather than leaving you to interpret a flagged number on your own.
Pricing and What’s Included : Function Health reviews
Membership currently runs $365 a year, down from an earlier $499 price point — the company dropped it in November 2025 as part of a push to make the service more accessible. It’s insurance-free by design: no deductibles, no co-pays, no claims to file, though members can use HSA or FSA funds and get an itemized receipt for reimbursement if their plan allows it. New York and New Jersey residents typically pay more due to state lab regulations, and the service isn’t currently available in Rhode Island.
Once you’re a member, you also get access to add-on tests that aren’t part of the base panel — things like the Galleri multi-cancer detection test, environmental toxin screening, and brain health testing, all at extra cost. Function’s 2025 acquisition of Ezra also brought full-body MRI and CT scanning into the fold, with an AI-assisted MRI option priced separately at $499.
What Reviewers Actually Say
The most consistent praise across review sites centers on breadth and clarity. Getting 160+ markers in one membership is simply more than most people have ever seen from a standard checkup, and the dashboard breaks results down by body system with plain-language explanations rather than a raw lab report full of abbreviations. People who’ve stuck with it for multiple testing cycles tend to highlight the trend-tracking as the real payoff — a single round tells you where you stand, but repeated rounds show you which direction things are moving.
The criticism clusters around a few consistent points. The price, even at $365, is still more than some flat-rate competitors charge for comparable panels. Scheduling a draw can be inconsistent depending on location and phlebotomy availability. And because Function tests and flags rather than diagnoses or treats, it works best as a screening layer on top of, not a replacement for, an actual doctor relationship — a distinction the company itself is upfront about.
Who It Makes Sense For
Function Health tends to fit people who already think in terms of tracking and optimizing their health, rather than someone looking for a one-off blood test. If you want a single comprehensive baseline and don’t care about a follow-up draw, cheaper single-panel options exist. But if the appeal is having 160+ data points refreshed twice a year with a clinician actually reading them, the membership model is built around exactly that kind of ongoing use.
The Bottom Line
Function Health isn’t a diagnostic tool, and it won’t replace a doctor who knows your history. What it does reasonably well is give people access to a level of lab testing that used to require either strong insurance or a lot of out-of-pocket cash spent piecemeal at individual labs. Whether $365 a year is worth it comes down to whether you’ll actually use the two draws, read the results, and act on what they tell you — the panel itself is only half the value; the follow-through is the other half.
