Function Health Results: What to Do With Them (and Where They Can Live)

Function Health is a testing membership — it runs 100-plus biomarkers a year and shows you the results. If you're looking for an "alternative," it helps to be precise about what you actually want, because the most common need isn't a different testing service — it's a durable home for the results you already have. Libby isn't a testing membership and doesn't compete on drawing blood. It's the record your Function panel (and every other lab) can live in for life, on one timeline you own and can feed to an AI or a clinician. This is a fair look at where each fits.

We think Function is a genuinely useful product. The point below isn't to talk you out of it — it's to answer the question its own users ask most: I got 100 markers back, now what, and where do they live?

What's a good alternative to Function Health?

It depends on which part you're trying to replace:

• If you want a different way to get tested — a different panel, price, or cadence — then the alternatives are other testing services, and that's a different article.
• If you want somewhere to keep and track the results over time — the thing a membership doesn't durably solve — then what you want isn't another testing service at all. It's a personal health record: a place you own that holds your Function results alongside every other lab, for years.

Most people typing "Function Health alternative" turn out to want the second one. So the honest framing is: Libby is a complement to a testing membership, not a swap for the blood draw.

What Function Health does well

Credit where it's due. Function's pitch is a large annual panel — well over 100 biomarkers, far more than a standard physical orders — plus clinician review and a clean interface for reading each result. For someone who wants breadth and a guided first look, that's a real service, and the broad panel surfaces markers most people never get tested, like Lp(a)¹ or ApoB², that genuinely matter for long-term risk.

Where the model has a natural limit is time and ownership. A membership is built around this year's testing. The questions that pay off most in health — which of my markers are trending the wrong way, and what changed? — need a record that spans years and survives whether or not you keep paying. That's the gap a personal health record fills.

The real question: where do your results live?

Say you run a Function panel this year and a great one. Two years from now you want to know whether your ApoB is drifting, whether that HbA1c nudge held, whether the Lp(a) you finally measured is worth acting on. To answer any of that you need your Function results next to your earlier labs, your doctor's draws, and whatever you test later — lined up on one axis.

That's the crux, because the signal in lab work is the trend, not a single reading. A panel you can't compare to your history is a snapshot. And if results live only inside one service's app, they're one cancellation away from being hard to reach. Owning a copy is what turns a great annual panel into a decade of signal.

Function Health vs. a personal health record

They're different categories, so a fair comparison is about role, not "better":

Read that as "these do different things," not "one wins." Many people keep a testing membership and a personal record — the membership tests, the record remembers.

What to do with your Function results

Concretely, once your panel is back:

1. Read it as a starting line, not a verdict. A first big panel is a baseline. The value compounds when you can compare the next one to it.
2. Get a copy out. Download or export your Function results as a PDF so you have them independent of the membership. (Doing the same for Quest and LabCorp pulls your whole picture together.)
3. Put them on a timeline you own. Import the panel into a personal health record so each marker joins one axis with your other labs.
4. Ask better questions. With your history in a structured form, you can hand it to ChatGPT or Claude or bring a clean summary to a clinician — and reason about your trend, not a generic range.

Where Libby fits

Libby is the record for step three. Drop in your Function PDF and it reads every marker, reconciles the units, and files each one onto a single timeline alongside your Quest, LabCorp, or hospital results — so your 100-marker panel stops being a one-time readout and becomes part of a history you can actually track. It's your data, exportable anytime, and ready to share with an AI or a clinician. Libby also computes a biological age from the relevant markers, which a broad panel is well-suited to feed.

If you've got a Function panel and want it to last longer than the membership, start your record and import it — the first upload takes about a minute.

FAQ

What's a good alternative to Function Health? It depends what you want. For a different way to get tested, look at other testing services. For somewhere to keep and track your results over time, you want a personal health record you own — which complements a membership rather than replacing the blood draw.

Can I keep my Function Health results if I cancel? Export your results as a PDF and import them into a record you own, and they stay with you regardless of your membership status. Owning a copy is the point.

Can I combine my Function results with my Quest and LabCorp labs? Yes — a personal health record consolidates results across providers onto one timeline, reconciling different units and marker names so everything lines up.

Is Libby a testing service like Function? No. Libby doesn't draw blood or sell panels. It's the record your labs live in — you bring results from Function, Quest, LabCorp, or your doctor, and it tracks them over years and makes them usable with AI or a clinician.

Educational content, not medical advice. This article is for general information and personal record-keeping. It isn't a diagnosis or a treatment plan, and reference ranges vary by lab and by person. Always talk to a qualified healthcare professional about your results and any decisions that follow from them.