Your labs came back normal.
You know you're not.
Even the most comprehensive biomarker testing on the market checks around 100 markers and calls it a day. Antygen reads millions of antibody signals from a single drop of blood, including the autoantibodies that can drive real symptoms while routine bloodwork stays “normal.”
Everything we test for, in one sample.
There is no test menu to pick from. Every sample runs against the whole array: 129 named readouts across 18 families, drawn from 21,000+ protein targets, every time.
Why normal results can still be wrong.
When every test comes back clean but you still feel wrong, the problem usually isn't you, it's the resolution of the test. Even the most advanced biomarker panels were never built to see the immune system attacking its own tissue. That signal lives in your antibody repertoire, and almost nobody is looking at it.
“Everything looks normal.”
The most thorough biomarker panel on the market reads about 100 markers. Your immune system runs on millions of signals.
Autoantibodies hide.
Antibodies attacking your own tissue can be present years before a diagnosis, and years before a standard test thinks to look.
You deserve the full picture.
Not a shrug. A map you can actually bring to your doctor.
A layer nothing else reads.
The array behind
the papers.
Every sample runs on HuProt, the human proteome array, plus the full VirScan viral panel, at CDI Labs. The same platform behind peer-reviewed autoantibody discovery, not a consumer approximation of it.
21,000+ human proteins on every chip
997 patients profiled in the validation cohort
Six domains, 129 named readouts, one sample.
Every kit runs the full panel. Nothing is tiered, nothing is upsold, and nothing here is a separate test you have to choose.
Autoimmunity and self-attack
- Lupus (SLE)
- Hashimoto's thyroiditis
- Myasthenia gravis
- Celiac disease
- +30 more
IgG binding to your own proteins, scored against a reference cohort.
Only AntygenPrivate autoantibodies no clinical panel names yet
Infection and vaccine history
- Epstein–Barr virus
- Cytomegalovirus
- SARS-CoV-2
- COVID-19 mRNA series
- +22 more
Peptide-level antibody binding across the human virome.
Only AntygenPeptide-level virome, not a handful of titers
Allergy and hypersensitivity
- Peanut allergy
- Dust mite allergy
- Latex allergy
- NSAID hypersensitivity
- +25 more
IgE binding across food, environmental and industrial allergens.
Only AntygenIndustrial and drug allergens beyond the food panel
Receptor blockade and nutrient transport
- Anti-CD320 (B12 transport)
- Intrinsic factor blockade
- Folate receptor autoantibodies
- Insulin receptor antibodies
- +1 more
Antibodies acting like drugs, blocking or activating your own receptors.
Only AntygenBlockade invisible to a normal serum level
Immune age and cancer surveillance
- Immune age vs. calendar age
- Repertoire diversity index
- Anti-tumor antibody signatures
- Paraneoplastic antibodies
- +6 more
Repertoire diversity against your calendar age, plus anti-tumor signatures.
Only AntygenImmune age from repertoire, not chronology
Post-viral, autonomic and drug response
- Long COVID immune signature
- POTS-associated receptor antibodies
- Anti-interferon autoantibodies
- Anti-drug antibodies (ADA)
- +21 more
Receptor antibodies and anti-drug antibodies that follow an immune event.
Only AntygenReceptor antibodies behind unexplained symptoms
What the resolution gap costsOver half of all autoantibodies observed have never been described before.
Which means the thing driving your symptoms may simply not be on anyone's list yet. That is the gap Antygen was built to close.
Conditions people come to us about.
Many people who find Antygen are somewhere in one of these journeys, diagnosed, suspected, or still searching.
Antygen adds context, it doesn't replace a diagnosis.
Conditions like POTS (diagnosed by tilt-table testing) and MCAS (diagnosed via tryptase and clinical criteria) require evaluation by a clinician. Antygen contributes an immune-repertoire layer you can bring to that conversation; it is not a stand-alone diagnostic for these conditions.
From your kitchen table to 21,000 proteins.
Every other advanced panel depends on a draw site near you. Antygen's collection method travels by post, so the coverage map is the postal service.
One drop, at home
A finger-prick dried blood spot. No clinic, no phlebotomist. Mail it back in the prepaid kit.
Screened on HuProt
Your sample runs across 21,000+ human proteins plus the full VirScan viral panel.
Read at CDI Labs
The lab behind published, peer-reviewed autoantibody discoveries processes your repertoire.
Your immune map
Millions of signals become a clear, trackable profile in your private portal.
Her B12 was “normal.” She was still declining. One antibody explained why.
Serum B12 looked perfectly normal, yet the patient kept deteriorating neurologically. The cause: an autoantibody blocking the CD320 receptor that carries B12 into cells. The vitamin was in the blood; it just couldn't get where it needed to go. Invisible to standard labs. Visible in the antibody repertoire.
Frequently asked questions.
Possibly. Standard tests check a limited set of targets. Antygen screens your antibody response across 21,000+ proteins, so it can surface immune signals a narrow panel wasn't designed to catch. Anything it finds is meant to be reviewed with your clinician.
No. Those are diagnosed clinically (for example, tilt-table testing for POTS, tryptase and clinical criteria for MCAS). Antygen adds an immune-repertoire layer you can bring to your care team, it's context and clues, not a diagnosis.
Never. Antygen is a research-and-wellness profile designed to give you and your clinician more to work with, not to replace medical care.
Often, yes. A repertoire-wide view can help you track immune activity over time and understand the fuller picture beyond the one or two markers your diagnosis was based on.
A simple finger-prick dried blood spot at home. No clinic visit, no phlebotomist. Everything you need ships in the kit, and return postage is prepaid.
We're onboarding the early-access waitlist in stages. Join now to hold your place; we'll email you the moment kits are ready in your region.
Start putting the picture together.
Join the waitlist and be first in line when at-home immune profiling opens, and bring your immune map to the next conversation with your doctor.