At $365/year with two annual draws and 160+ directly measured biomarkers, Function Health is the most comprehensive subscription-based testing service on the market. Here’s what you actually get, what it’s worth, and when Superpower or à la carte testing is the better call.
Function Health, co-founded by Dr. Mark Hyman and Jonathan Swerdlin and backed by $298 million in Series B financing (raised November 2025), is a direct-to-consumer biomarker testing platform built around the premise that the data underlying most serious disease begins accumulating years before diagnosis — and that consumers should be able to see it without waiting for a physician to order it.
The membership includes two comprehensive blood draws per year at Quest Diagnostics locations. The first draw covers the full 100+ marker panel. The mid-year follow-up covers the roughly 60 most clinically significant markers — enough to detect meaningful changes from interventions made after the first draw. Results are delivered through a polished dashboard with per-marker explanations, flagged values, a clinician review process, and a personalized protocol. An AI-assisted protocol builder is in beta as of early 2026.
AgelessLabs does not currently have an affiliate relationship with Function Health. This review is included because it’s one of the most-searched services in our audience, and an honest comparison requires covering it. If you decide to purchase, a referral link from a current member typically unlocks $25 off.
Function’s panel is the most comprehensive available at a non-concierge price. The key differentiator versus Superpower is not just volume — it’s the categories of markers that Superpower doesn’t offer at any tier:
| Category | Key markers included | vs. Superpower |
|---|---|---|
| Cardiovascular | ApoB, Lp(a), NMR lipoprofile, hsCRP, homocysteine, omega-3 index, fibrinogen | Lp(a) + omega-3 included (add-ons at Superpower) |
| Metabolic | HbA1c, fasting glucose, fasting insulin, ALT/AST, GGT, full CMP | Comparable |
| Hormonal | Total + free testosterone, estradiol, progesterone, SHBG, DHEA-S, IGF-1, cortisol | Comparable |
| Thyroid | TSH, free T3 + free T4, reverse T3, TPO antibodies | Reverse T3 + TPO antibodies included |
| Inflammatory | hsCRP, homocysteine, IL-6, fibrinogen | IL-6 included |
| Cancer markers | PSA, CEA, AFP, CA-125 (women) | Not available at Superpower |
| Heavy metals | Lead, mercury, arsenic | Not available at Superpower |
| Autoimmune | ANA screen | Not available at Superpower |
| Nutrients | Vitamin D, B12, ferritin, folate, zinc, magnesium, omega-3 index | Magnesium + omega-3 included |
The mid-year follow-up draw covers approximately 60 of the highest-priority markers — the cardiovascular, metabolic, inflammatory, and hormonal set that moves meaningfully in response to lifestyle and supplement interventions. It does not repeat the full panel.
Most biomarker services test you once per year. Function’s mid-year draw is the only way to answer the question that matters most: did the intervention work? If your first draw showed elevated ApoB and low Vitamin D, and you spent six months adjusting your diet and supplementing — the mid-year draw tells you whether it moved. That test-intervene-retest loop is what preventive medicine is actually supposed to do.
Function’s dashboard is polished and well-organized — results are grouped by category with clear flagging, per-marker explanations, and recommended next steps. The desktop and mobile app experience is consistently praised for being clean and non-overwhelming given the volume of data.
The AI protocol builder, introduced in early 2026, generates a full-body optimization plan from your biomarker profile, health goals, and stated preferences. Compared to Superpower’s more mature AI chat, Function’s AI feels slightly less conversational in early reviews — but the protocol generation feature is a meaningful addition that is being actively developed.
One notable limitation: Function does not allow historical lab data import. If you have years of prior bloodwork, you cannot integrate it into your Function dashboard — you start fresh. Superpower’s “Bring Your Own Data” feature handles this and it’s a real advantage for users with an established testing history.
Function launched at $499/year. In late 2025, facing competition from Superpower ($199) and Empirical Health ($190), Function reduced pricing to $365/year for new members. The rollout was initially botched — existing members were initially told they would continue paying $499 while new members got the lower rate. The backlash on Reddit was swift and pointed; Function ultimately addressed the disparity, though early adopters were understandably frustrated.
At $365/year, the value proposition is meaningfully improved. Two draws at 160+ markers works out to roughly $1.40 per marker per draw — substantially cheaper than ordering equivalent tests piecemeal through à la carte services.
No home draw option. All draws at Quest Diagnostics. Not available in NY, NJ, or RI. Referral links (not promo codes) are the only reliable way to access a discount.
| Service | Price | Draws/year | Biomarkers | Best for |
|---|---|---|---|---|
| Function Health | $365/yr | 2 | 160+ | Active health management, cancer markers, tracking interventions |
| Superpower | $199/yr | 1 | 100+ (150 w/ratios) | Entry-level longevity testing, budget-conscious, first draw |
| Ulta Lab Tests | À la carte | Unlimited | Any combination | Custom panels, frequent testing, maximum cost control |
| InsideTracker | $489 entry | 1 | ~54 | Athletic performance optimization |
For à la carte testing without a subscription, the Ulta Lab Tests review covers the direct-to-consumer alternative. For the detailed head-to-head with Superpower, see our Superpower Health review.
Function Health is the right choice if you’re actively managing a cardiovascular, hormonal, or metabolic health issue and need to track response to interventions across the year. The twice-yearly draw is the key — if you only need a single annual snapshot, Superpower at $199 is the better value. If you want cancer marker or heavy metal screening alongside your biomarker panel, Function is the only service in this price category that offers it.
It’s also the right choice for anyone who wants the most defensible, complete picture of their health — all direct measurements, clinician review on flagged values, and the broadest marker coverage available outside of a concierge medicine practice.
Where it falls short: if you have existing years of lab data you want to integrate, Superpower’s historical import feature is a meaningful practical advantage. And if budget is the primary constraint, Superpower’s $199 covers the longevity fundamentals at two-thirds the price.
Upload or paste your labs into our AI tool for a deeper longevity analysis — every marker scored against longevity-optimal ranges, not just standard lab reference ranges.