I’m the person my friends text at midnight when their doctor says “your labs look fine” but they still feel terrible.
I was that patient for years: undiagnosed autoimmune disorder, chronic eczema, a body doing things that nobody could explain because the standard 12-marker blood panel kept coming back “normal.” I spent years advocating for my own labs, arguing for panels that weren’t “medically necessary,” submitting stool samples, testing my microbiome, doing the things that got me side-eyes from conventional doctors but ultimately cured me. So when I say I’ve been through my own set of blood testing, I mean it.
At this point in my life, I’m healthy and just always looking for ways to biohack and optimize. I want to live well into my 90s as a happy, healthy old lady. That’s genuinely the goal. So when I started hearing about companies like Function Health, I was intrigued and went down the rabbit hole researching all of them.
Here’s what I found.
The problem with the traditional system
Before I break down the platforms, you need to understand what they’re solving for because it’s bigger than “more blood tests.”
The standard medical system gives you roughly 12–15 markers at your annual physical. If nothing’s flagged in a critical range, you’re told you’re fine and sent home. What it doesn’t do: track trends over time across multiple doctors, spot early patterns before symptoms appear, or let you access anything in one place. Your cardiologist doesn’t see what your GYN ordered. Your new PCP doesn’t have the panel your last doctor ran two years ago. The data exists, but it’s scattered, siloed, and functionally useless for anyone trying to understand their health as a whole.
That’s what these companies are actually building: a centralized, longitudinal picture of your body’s biomarkers, tested frequently enough to catch what’s changing.
A breakdown of the players out there
1. Function Health: The One I’d Pick Today
Function tests 160+ biomarkers chosen by what they describe as the world’s top doctors covering heart health, hormones, immunity, metabolic function, early signs of cancer, and more. The premise is proactive detection: spotting changes before symptoms appear, so you can act earlier.
What makes Function stand out:
The imaging add-ons. No other company in this space offers this kind of depth at an accessible price point. Members can add MRI scans, a Lung CT, and a Heart CT, covering everything from early cancer screening to brain health to heart disease risk. Full details on what each scan covers here.
The centralized records. You can upload labs from previous records and health history so everything lives in one place over time. This is the piece that matters most to me. Instead of a drawer of PDFs from five different portals, you have a running timeline of your health that’s being tracked and benchmarked, so you can actually spot patterns and red flags before they become emergencies.
The testing cadence. They retest every 3–6 months. That’s how you build the baseline. One lab result tells you where you are; repeated testing tells you where you’re going.
The pricing. $365 for one year. Currently running a deal: two years for $500. They apply a $200 credit toward the Annual MRI for members. Concierge blood draw available as an add-on (they come to you).
My one real note on Function: the $999 MRI is an investment. But when I think about what it costs to get an MRI through the traditional system — fighting for coverage, making a case for why it’s “medically necessary,” paying out-of-pocket if they deny it — $999 as a member is genuinely the most affordable access point I’ve seen for this kind of imaging.
2. Superpower: If You’re Managing Supplements + Meds
Superpower’s setup looks similar to Function at first glance, but it goes broader: it factors in your supplements and medications alongside your labs, which is something Function doesn’t explicitly address. They also have an in-app marketplace for prescription supplements and year-round access to a care team, so you’re not just getting data, you’re getting ongoing guidance on what to do with it.
Pricing: $200/year.
Who it’s for: If you’re already managing a supplement protocol or on medication and you want your lab results interpreted in that context, Superpower fills a gap Function doesn’t. If you’re just starting your health optimization journey and want the most comprehensive biomarker picture, Function’s depth is still stronger.
3. Mito Health: Solid But Less Comprehensive
Similar concept to Function and Superpower, priced at $350/year. The catch: their base membership doesn’t include the same breadth of testing. Some of what’s standard on Function and Superpower shows up as a paid add-on at Mito. Worth knowing before you compare sticker prices.
4. SiPhox Health: Build-Your-Own Option
SiPhox lets you select your specific biomarkers rather than buying a bundled panel, and appears to allow more frequent testing than the others. If you already know your body well and want to track specific markers closely (think: someone deep in their optimization era who knows exactly what they’re monitoring), this is worth a look. The pricing wasn’t fully transparent on their site — an introductory offer of $74 was advertised but the cadence wasn’t clear, so read the fine print before signing up.
5. Hundred: Budget-Friendly Function Alternative
Hundred offers a similar experience to Function at $200/year — a solid lower price point if imaging isn’t on your radar. No CT or MRI add-ons available, which is a meaningful gap for anyone who wants the full-body picture. But if you’re mainly focused on biomarker tracking and want a clean, centralized platform at a lower commitment, this is worth considering.
6. Hers: Simple Panel, Limited Info
Hers launched what appears to be a 40-marker panel at under a dollar a day. Their site doesn’t disclose which 40 markers are included, which is a red flag when you’re trying to evaluate what you’re actually getting. This reads more like a discounted comprehensive panel than a true proactive health platform, a reasonable entry point, but not the same category.
7. Hone — One-Time Test, Not a Platform
Hone offers a one-time panel (40 markers) for $65. No longitudinal tracking, no records storage, no imaging. Good for a snapshot; not useful if what you want is to monitor changes over time.
MY TAKE
If I had to pick one today, it’s Function.
The depth of testing, the imaging add-ons, the centralized records, the pricing relative to what you’d pay trying to cobble this together through the traditional system — it’s the most complete option I’ve found.
If you’re deep in supplement/medication management and want a care team factoring that into your results, layer in Superpower. If you’re already tracking specific markers and want to build your own protocol, look at SiPhox.
Note: I’m not a doctor and nothing here is medical advice. I haven’t personally signed up for any of these platforms — this is based on my research into each one.

Thania (TA Content Mgr)