Function Health: in-depth breakdown

Function Health, founded by Mark Hyman, offers 100+ biomarkers for $499 per year, with re-testing of 60 of the biomarkers mid-year. Dr Hyman started the Cleveland Clinic's Functional Medicine program and was made famous by The Katie Couric Show.

I tried Function Health when they first launched. The appeal of getting a bunch of really advanced biomarkers (ApoB, Lp(a), particle sizes, hormones, etc) without doctor gatekeeping was obvious. I also liked the idea of getting the Grail multi-cancer test.

Here's what I think Function did well: the blood test report is attractive and well-designed, with nice colors. The pricing is cheaper than what I could get myself or from my doctor.

Where I think Function could improve is the follow up. The "clinician report" that you get is essentially written by ChatGPT, it recommends some supplements, but aside from that, there's not much. The mobile apps just let you view your results. You can't track results over time since there's no way to upload PDFs of previous blood tests.

I think Function's price of $365 is also higher than newer alternatives, like Superpower ($199) and Empirical ($190).

Overall, I think Function Health is a good option for those who want a comprehensive blood test, but I think they'll need to step up their game to stay competitive.

Function Health pricing

Function Health currently costs $365 per year, down from the original $499 price point. The price drop came as competitors like Superpower ($199) and Empirical Health ($190) entered the market with aggressive pricing.

However, the price change wasn't without controversy. When Function lowered the price for new members, they initially planned to keep charging existing members the original $499 rate. This sparked backlash on Reddit, where early adopters felt punished for their loyalty. Function eventually addressed the issue, but it left a sour taste for some of their original supporters.

Function does twice-per-year testing

Function Health provides two comprehensive lab visits per year. The first annual test includes 100+ biomarkers, followed by a mid-year test with 60+ biomarkers to track changes and progress.

Function Health web dashboard

The Function Health web dashboard at functionhealth.com lets you view your results, explore each biomarker in detail, and access your health data from any browser. The interface is clean and modern, making complex biomarker data accessible. Honestly, it just looks a lot better than the built-in Quest report.

Function Health iPhone & Android apps

Function Health offers mobile apps for both iOS and Android. The apps mirror most of the web dashboard functionality, letting you check results on the go. You can view trends over time and get notifications when new results are ready. The mobile experience is solid, though I find myself using the web version more often for deeper dives into the data.

Function doesn't work with insurance

Function Health operates outside the insurance system. On the bright side, this means the pricing is transparent. On the other hand, some of the biomarkersare covered by insurance, so I have to feel like there's a cheaper version of this.

Function Health discount codes

Function Health occasionally offers promotional discounts, typically around $100 off the annual membership. The most reliable way to get a discount is through their referral program—existing members can share a referral link that gives new users a discount.

I've seen influencer codes floating around on podcasts and social media, usually offering 10-20% off. These tend to come and go. Black Friday and New Year are also common times for promotions. If you're not in a rush, it might be worth waiting for a sale.

One thing to note: Function doesn't stack discounts, so you can't combine a referral code with a promotional offer.

Function Health reviews

Function Health reviews are generally positive, with most users praising the comprehensiveness of the biomarker panel and the quality of the results dashboard. The service has a strong following among the health optimization and biohacking communities. The app has over 14,000 ratings on the Apple App Store.

Common praise includes: the breadth of testing (100+ biomarkers), the clean UI, the inclusion of advanced markers like ApoB and Lp(a), and the twice-yearly testing cadence. Many users appreciate not having to convince a doctor to order these tests.

Common criticisms include: the AI-generated clinician reports feel generic, there's no way to import historical lab data, and the price point is higher than newer competitors. Some users also wish they could customize which biomarkers to test.

Here's what users are saying on Reddit: "I'd say yeah for the price now. A dollar a day and you get great blood work…" and "I just did mine and I loved it. It gave me so much insight to what's going on in my body." Though not everyone feels the results are actionable on their own: "I found the extra data interesting, but ultimately needed a doctor to properly interpret it."

What health experts say about Function Health

Not all physicians are sold on the comprehensive testing approach. Some worry that casting a wide net with 100+ biomarkers can lead to false positives and unnecessary anxiety.

"I wouldn't want to pick up risk by just doing large numbers of tests. I'd rather line those up with what is a person clinically known to be at risk for."

On the other hand, some health influencers are strong advocates. Andrew Huberman, the Stanford neuroscientist behind the popular Huberman Lab podcast, is on Function's advisory board:

"Comprehensive lab testing like this is so important for health, and while I've been doing it for years, I've always found it to be overly complicated and expensive. I've been so impressed by Function — both at the level of ease of use that is getting the tests done, as well as how comprehensive and actionable the tests are — that I recently joined the advisory board."

Worth noting that Huberman has a financial relationship with Function, so take his endorsement with that context in mind. Still, the broader point stands: opinions are divided on whether comprehensive testing is valuable for everyone or better reserved for those with known risk factors.

Function Health competitors

The direct-to-consumer blood testing space has gotten more competitive since Function launched. Here are the main alternatives:

• Superpower ($199/year) — Similar biomarker panel at a lower price point. Newer company but gaining traction.
• Empirical Health ($190/year) — Budget-friendly option with a solid core panel. Good for basics.
• InsideTracker ($589+/year) — More established player with personalized recommendations. Higher price but more actionable insights.
• Marek Health ($350+/year) — Popular in the fitness community, offers hormone optimization focus.

Each has trade-offs in terms of biomarker selection, price, and follow-up support. Function's main advantage is the combination of breadth and Dr. Hyman's brand credibility.

Function Health funding

Function Health has raised $350 million in total funding and is valued at $2.5 billion as of late 2025. The Series A was led by Andreessen Horowitz (a16z), and the Series B was led by Redpoint Ventures. The company reports nearly 50,000 paying members with a waitlist of over 200,000.