What Function Health actually is.
Function Health is a U.S. subscription service that bundles two comprehensive lab draws per year — together giving access to more than 100 biomarkers — with an MD review on every result and a dashboard that tracks your numbers over time. Pricing sits at $499 a year. Samples are collected via venous draw at Quest Diagnostics or partner-affiliated lab locations, not via finger-prick at home.
The pitch is that comprehensive preventive lab work has historically been gated either by an unusually proactive primary care doctor or by a hefty out-of-pocket bill. Function is selling access. They've made comprehensive testing into a consumer product, with a dashboard layer designed to make the data legible to someone who isn't a clinician.
That dashboard is part of what justifies the subscription model. You can see your numbers trend over time. You get a plain-English summary on each marker. You get a "what to focus on next" routing pattern that tries to translate a wall of numbers into an action queue. It's the most usable consumer testing UI in the U.S. category right now.
"The price is fair for what's in the box. The subscription is the part that demands honesty about whether you'll actually use it."
The Heme Score breakdown.
Every product on Heme is scored against the same seven criteria, normalised to a 100-point scale. Here's how Function Health scored.
How Function Health scored, criterion by criterion
Where Function loses points
The two genuine deductions are around sample method and price. Function still requires you to physically visit a partner lab for the draw. For women living far from a Quest location, or with the kind of jobs that make a weekday lab visit a hassle, that's friction. Finger-prick at-home competitors win on convenience even where they lose on breadth.
On price: $499 a year is competitive when you compare it to other comprehensive platforms in the U.S., but it's not cheap. If your insurance already covers an annual preventive panel via your primary care provider and you don't need the additional markers Function offers, the value calculus shifts.
What you actually get for $499.
Function bundles together a meaningfully broader marker set than most insurance-covered annual physicals. The headline numbers: 100-plus biomarkers across two draws per year, with the dashboard showing both individual results and longitudinal trending.
The marker groups span what you'd expect from a comprehensive wellness panel — iron and nutrient status, thyroid function (in fuller detail than just TSH), reproductive hormones, lipids and metabolic markers, inflammation markers, and a heavy-metals screen. The specifics evolve over time as Function updates its panel composition.
One detail worth flagging: the panel meaningfully overlaps with what longevity-focused clinics charge $700 to $1,200 for as a one-off. If you're the kind of reader who'd otherwise be paying out-of-pocket for that style of comprehensive workup, Function's subscription model is the cheaper path.
How Function compares to the alternatives.
The four real comparison points in the U.S. market right now are InsideTracker, LetsGetChecked's comprehensive panel, ordering directly through Quest or Labcorp, and asking your primary care provider to expand their standard annual panel.
| Service | Markers | Sample | Clinician | Annual cost | Heme Score |
|---|---|---|---|---|---|
| Function Health | 100+ | Venous, in-clinic | MD review | $499 (2 draws) | 94 |
| InsideTracker | ~48 | Venous, mobile | Action plan | $349 (single) | 86 |
| LetsGetChecked Comprehensive | 14 | Finger prick | Written report | $149 (single) | 87 |
| Quest Direct | 22 | Venous, Quest lab | MD-reviewed | $179 (single) | 81 |
The honest read of that table: Function wins on breadth and the clinician layer. LetsGetChecked wins on price for first-time testers who want a screening panel rather than a comprehensive look. InsideTracker is the more interesting alternative for the optimization-minded reader who wants a strong "what to do about it" output layer.
Who Function Health is actually best for.
Best for
- Women who want comprehensive wellness data as a yearly habit, not a one-off check
- The optimization-minded reader who likes longitudinal trending data
- Women without a primary care provider running preventive labs in their 30s and 40s
- Women whose insurance won't cover comprehensive prevention panels
- Anyone whose alternative is paying a longevity clinic $700-$1,200 for a similar workup
Less best for
- One-time testers who want a single comprehensive look without subscription lock-in
- Women in states or zip codes far from a Quest or partner location
- Women looking for cycle-day-timed hormone testing (Modern Fertility handles timing better)
- Women needing perimenopause-specialist follow-up (Midi Health or Alloy pair better with this)
- Anyone whose insurance already covers what they need annually
The case against.
This is the section every honest brand review needs and every brand-funded one quietly skips. Here's what we'd flag about Function Health:
The subscription model creates a kind of lock-in. If you stop subscribing, you lose access to the trending dashboard that justifies a chunk of the value. That's a feature for Function's revenue model. For a reader, it's a small consideration worth being honest about upfront.
The MD layer is generalist, not specialist. The MD reviewing your results is doing comprehensive wellness review, not specialist consultation. For complex women's-health questions — fertility, perimenopause, autoimmune patterns — you'll still need a specialist. Function isn't a replacement for an endocrinologist, an REI, or a perimenopause-trained provider.
The dashboard sometimes over-routes toward action. Some of the "what to focus on next" prompts can nudge readers toward supplement recommendations or lifestyle changes when "watch and re-test" might be the better call. The dashboard's tone is calm, but the underlying suggestion engine is calibrated for engagement.
State availability isn't a clean "yes" everywhere. Function lists all 50 states, but lab partner coverage and turnaround times vary. If you're rural, verify accessibility before you commit to the annual price.
Should you actually subscribe?
The honest framing: it depends on three things. One — do you have a current primary care provider running comprehensive preventive labs? If yes, Function may be additive rather than essential. Two — will you actually use the dashboard? Subscriptions reward repeat usage; if you'll check once a quarter and never log in, it's overpriced. Three — what's the alternative you're costing it against? Against a longevity clinic, Function is the budget option. Against a $99 insurance copay, it's a premium add.
For the women's-health audience this site serves, Function is the best comprehensive subscription option in the U.S. category today. It's not perfect, but the category gap between "Function" and "next-best" is real.
Ready to compare Function Health vs alternatives?
See the full comparison table — Function vs InsideTracker vs LetsGetChecked vs Quest Direct vs Labcorp OnDemand vs five others — scored on the same framework.
See the full comparisonSome links above are affiliate. Editorial coverage is independent.
FAQ.
Is Function Health worth $499 a year?
For the right reader, yes. Function bundles two comprehensive lab draws plus an MD review for $499 — a price that compares favourably to what longevity-focused clinics charge for a similar workup. If you'd otherwise be spending out-of-pocket on comprehensive labs, or want a yearly habit of comprehensive wellness data, the maths works. If you'd only use it once and skip the annual renewal, it's overpriced.
Will my insurance cover Function Health?
Function operates as a direct-pay service. Some readers have had success submitting receipts for partial reimbursement to FSA/HSA accounts. Check your specific plan before counting on coverage.
Is Function Health HSA/FSA eligible?
Generally yes — most U.S. HSA and FSA accounts will reimburse for diagnostic lab testing. Function provides receipts suitable for submission. Confirm with your specific plan administrator.
How does Function compare to my annual physical labs?
Function's panel is meaningfully broader than what insurance typically covers as a standard preventive physical. Where most annual physicals run 8 to 15 markers, Function runs 100-plus. Whether that breadth is useful for you depends on what questions you're actually trying to answer.
Is Function Health available in my state?
Function lists all 50 U.S. states as supported, but lab partner accessibility varies by location. Confirm on Function's site that there's a draw location reasonably accessible from your zip code before subscribing.
Can I cancel Function Health after one year?
Yes. Function operates on an annual subscription. You can cancel before renewal. Your historical data remains accessible during your active subscription window; access policies after cancellation are worth confirming directly with Function.
Does Function Health diagnose conditions?
No. Function provides results data and an MD review with general commentary. They are not a substitute for diagnosis or treatment by your healthcare provider. If results suggest something worth investigating, you take them to your provider.
What if my Function results show something concerning?
Function flags clinically significant results in their MD review. The next step is taking the results to a qualified healthcare provider — your primary care provider, OB-GYN, or relevant specialist — for clinical evaluation. Function is designed to inform that conversation, not replace it.