As someone who’s deeply committed to optimizing long-term health and performance, I’m always on the lookout for solutions that combine robust diagnostic data with meaningful, actionable insights. That’s what initially brought me to Function Health, a platform that promises to decode the body’s internal signals through comprehensive lab testing paired with clinician-guided recommendations.
Already a member of Parsley Health (Parsley review) and a regular user of InsideTracker (InsideTracker review), the decision to incorporate Function Health into my regimen felt like a natural next step in my health journey.
Here’s an in-depth look at my first round of testing with Function, what I discovered and why this platform could be a game-changer for health-conscious individuals looking to proactively manage their wellness.
Quick Summary
Product Name: Function Health
Category: Preventive Health & Diagnostics
Main Benefit: Data-rich lab testing with clinician-led insights
Price Range: $499/year (FSA/HSA eligible)
Availability: Nationwide
1. First Impressions
I came to Function Health driven by a clear mission: to take proactive control of my health using high-resolution data and expert guidance. Their promise of extensive, longitudinal lab testing combined with meaningful recommendations made them a compelling addition to my existing wellness stack.
Onboarding was impressively fast and frictionless. The platform is beautifully designed, intuitive and gave me an immediate sense of confidence. One standout experience came when I needed to reschedule my initial lab appointment. I was up early, riding my Peloton bike in the pre-dawn darkness and I decided to tweak my lab time. I messaged customer support, not expecting an answer until business hours. To my surprise, I received a live response from an agent right away. That kind of real-time service speaks volumes.
2. Key Features and Benefits
The Function Health membership includes two rounds of lab testing per year. My first set of tests covered over 100 biomarkers, providing insights into everything from cardiovascular and metabolic health to hormonal balance, vitamin/mineral levels, liver and kidney function, inflammation and beyond.
Extensive Testing: This breadth of data is unparalleled at the $499/year price point.
Clinician Review & Action Plan: Shortly after my labs were complete, I received a highly detailed summary from a Function Health clinician, including specific recommendations for lifestyle and nutrition changes.
Heart Health & Cortisol: Some flagged items included elevated cortisol levels - likely stress-related - and recommendations around cardiovascular health that aligned with known family history. Both of these are now active focus areas for me.
Biological Age Insight: Perhaps the most striking result was my biological age: 26 years, nearly 15 years younger than my actual calendar age of 41. Somebody call my wife and tell her that she’s robbing from the cradle! Kidding aside, I was a bit suspect of this result but upon further investigation into the metrics that go into the calculation, I now see how certain health markers of mine are contributing to this youthful biological age.
This was an encouraging validation that my health habits are paying off—but also a reminder to double down on areas where improvement is still needed.
3. Experience / Testing
I completed my first round of testing in May. Scheduling was easy through their partnership with Quest Diagnostics. My blood draw took less than 15 minutes and was available at a location just a few miles from home.
The results rolled in within two weeks and shortly thereafter, I received a detailed report from the Function Health clinician team (and although I can’t confirm it, my sense is that the analysis utilized insights from both a human medical practitioner and AI). I immediately shared my results with my Parsley Health team and my primary care physician. Both practitioners commented on how thorough the panels were and appreciated having such detailed diagnostics to work from.
Armed with my personalized clinician report, I’ve already begun implementing lifestyle changes. I plan to retest in six months and track the impact of these changes over time - one of the core promises of Function Health: turning personal health data into longitudinal insights.
4. Pros and Cons
Pros:
Comprehensive biomarker analysis across multiple health systems
Transparent pricing with no hidden fees
The value of the tests relative to the cost of membership
Fast lab scheduling and results turnaround
Exceptional customer support
Seamless interface and data presentation
Optional add-ons, like advanced cancer screening through Function’s recent acquisition of Ezra
I’ve been a fan of Ezra’s work since their early days and their focus on early detection aligns seamlessly with my broader philosophy around healthspan and disease prevention. The integration of their capabilities into the Function Health ecosystem only strengthens the platform’s preventive potential.
I’m especially excited by the possibility of exploring their platform firsthand - perhaps in a dedicated deep dive soon.
Cons:
Honestly, I can’t come up with any meaningful cons. If anything, the only drawback was the number of vials of blood needed for the test, which might turn-off needle-averse users.
5. Who It’s Best For
Function Health is ideal for anyone looking to take control of their health through comprehensive testing and expert guidance. It’s perfect for anyone - whether you’re someone simply looking to take a proactive approach to your health or if you’re tending to a personal or family history of chronic conditions and want to achieve real results.
At under $500/year, the value is unmatched compared to piecing together similar labs through insurance or a la carte testing.
6. Comparisons to Similar Products
Function Health offers a more structured and clinician-integrated experience than InsideTracker, while going far deeper into diagnostics than traditional primary care. Unlike at-home test kits from other companies, Function delivers clinical-grade testing and analysis with actionable follow-up recommendations.
It pairs well with Parsley Health’s functional medicine approach and can serve as a powerful data backbone for practitioners who need high-quality labs to drive decisions. I could even see a world in which Function Health joins forces with a platform like Parsley in order to offer patients ongoing lab-driven advice through regular patient-doctor dialogue.
7. Expert Insights
Co-founded by Dr. Mark Hyman, Function Health is steeped in the principles of P4 medicine: Predictive, Preventive, Personalized, and Participatory. The clinician notes I received aligned with current functional medicine thinking and the inclusion of markers not typically seen in routine physicals made this a valuable tool for spotting early trends.
A company is only as good as its team and in addition to Dr. Hyman, I’m also personally impressed by the caliber of other members of their team including their co-founder and CEO Jonathan Swerdlin.
8. Final Verdict
Function Health delivers on its promise of giving you control over your health, powered by real, actionable data. My initial experience has been overwhelmingly positive - from the onboarding process and lab testing to the level of insight and customer care. With a second round of testing already planned, I’m eager to see how the data evolves.
If you're serious about optimizing your health and longevity, Function Health belongs in your toolkit.
9. Where to Access
Function Health is available nationwide and can be purchased directly at Function Health.
Curious about what your labs might say? Give Function Health a try and start transforming data into a proactive roadmap for your wellbeing. If you’ve already used Function or have thoughts about testing platforms like it, share your experience - I’d love to hear what you found.
For more deep dives on personalized health services, check out my InsideTracker review and Parsley Health review.
