AncestryDNA raw data
A health report from the AncestryDNA file you already own.
MarkerView reads the raw data file Ancestry lets you download and returns one plain-English PDF: what your markers say about how you may handle common medicines, which of nine screened condition areas turned anything up, what your file could not cover, and what is worth asking your doctor to measure.
No new kit · No subscription · Self-service account/data deletion
AncestryDNA and 23andMe are trademarks of their respective owners. MarkerView is not affiliated with, endorsed by, or sponsored by either company; it reads the raw data file those services let you download.
Step one
Your AncestryDNA file, and how MarkerView reads it
Ancestry emails a download link rather than handing you the file — usually within about ten minutes, though it can take up to 24 hours. What arrives is a .zip holding one .txt: that text file is your raw data. The download steps are here. Leave it zipped and upload it as it arrived.
Inside are comment lines beginning with # — Ancestry's own header, naming the array version and stating that coordinates use genome build 37 — then a column-header row, then a marker per line in five tab-separated columns:
| Column | What it holds |
|---|---|
| rsid | The marker's reference SNP identifier, the rs number. |
| chromosome | Ancestry's own 1–26 coding. Never used here. |
| position | The coordinate on genome build 37. Also never used. |
| allele1 | The first of the two letters read at that marker. |
| allele2 | The second letter. AncestryDNA keeps the pair in separate columns — the layout difference that matters. |
A typical V2.0 export is roughly 677,000 marker rows and about 17 MB — typical, not fixed: Ancestry has shipped more than one array version. Two entries in the allele columns are not letters. A 0 means the array did not read that marker; an I or D marks an insertion or deletion. Both are skipped.
MarkerView identifies your file by its contents, not its name. The first two kilobytes are checked for Ancestry's header text plus the column names rsid, chromosome and position; a .zip is opened and the text inside checked the same way. Anything that is not the raw download — an ethnicity export, a PDF, a comma-separated file from another company — is refused before you pay. Only .txt and .zip, up to 30 MB in total. Full file rules.
Your file gives genotype letters on an older genome build and no reference allele, so MarkerView reads each marker's position and alleles from dbSNP build 150 rather than inferring them; a marker that does not resolve to a single-letter change is not analysed.
What you get
What is in the report
One PDF, emailed to you and waiting in your dashboard. It opens with a one-page handoff — a short, ranked list of what to actually do — then works through named sections. A section with nothing to put in it is dropped, so there is no fixed page count.
- Evidence-based genetic associations — the markers in your file, grouped by what they affect and written in plain English. Nine named condition areas are screened, and the result of each is shown, including the ones where nothing turned up.
- Pharmacogenomics — what your markers suggest about how you may process certain medicines. In the report's own words: a prompt to confirm with clinical testing, never a result to dose from.
- Polygenic and preventive insights — where common-variant patterns place you against a reference population. A statistical comparison, not a prediction and not a diagnosis. Only two panels can be scored, and a panel is left out when your file does not cover enough of it.
- Worth measuring directly, wellness and next steps, and an appendix of unconfirmed rare-variant calls kept at the back for the reason below.
Three sections appear only on Comprehensive, because Basic cannot supply their inputs: a medication interaction review of the prescriptions you list, a laboratory results section if you attach a recent Quest or Labcorp PDF, and a supplements section driven by those lab values and your medication list, never by your genotype and never with a dose printed. On Basic they still render and say plainly that nothing was provided. Walk through an anonymized sample →
Read this before you buy
What an AncestryDNA file cannot tell you
Your file was produced for genealogy. Ancestry's own terms and conditions state that information obtained from its DNA services is not intended for any medical, diagnostic, law-enforcement or paternity-testing purpose. None of this is an integration with Ancestry or an endorsement by it: you download a file and upload it, and we never sign in to your account there.
- It is a genotyping array, not sequencing. The chip reads a fixed set of predefined positions. It does not read whole genes, cannot tell which parent a variant came from, and cannot count gene copies.
- The analysed set is smaller than the file. No-calls, insertion and deletion markers, and identifiers dbSNP build 150 cannot resolve are dropped, so some of every AncestryDNA export is not analysed.
- “None found” is not a negative result. It means none found among the markers your array happened to cover. It never rules a condition out and is not a substitute for guideline-recommended screening.
- Rare alarming calls are not headlined. One laboratory that re-tested variants people brought in from consumer raw data reported 40% of them were false positives (Tandy-Connor et al., Genetics in Medicine, 2018). Such calls go in an appendix, framed for one action: asking your doctor about a confirmatory test.
- Nobody reviews your report. No clinician is in the loop for an individual report. MarkerView is an informational service, not a medical device, has not been reviewed or cleared by any regulator, and does not diagnose anything.
Three steps
From your Ancestry download to your report
1
Upload the .zip
Exactly as Ancestry emailed it. On Comprehensive you can add one 23andMe file; on Basic it is the single Ancestry file.
2
Add medicines, supplements and labs
Type in every prescription and supplement, and attach a recent Quest or Labcorp PDF if you have one. Comprehensive only.
3
Get the PDF
Usually within a couple of hours, by email and in your dashboard, yours to keep and print. Ancestry's own email wait comes before all this.
Where the statements come from
Sourced, not asserted
Drug–gene findings name the guideline behind them — CPIC or PharmGKB — with the identifier you can look up, and a finding with no guideline behind it is labelled as such rather than dressed up. What the analysis cannot supply is not printed: no odds ratios, no effect sizes, no population frequencies.
Classification, filtering and every safety gate are deterministic code. An AI writing model composes some connecting sentences, and its output is rejected rather than rewritten when it carries statistics, advice, dose language or raw marker codes. The full methodology →
Context
Tens of millions of these files already exist
Ancestry's own corporate figures put over 30 million people in what it describes as the world's largest consumer DNA network. Most of them have a raw data download sitting in an inbox, doing nothing at all.
The U.S. Food and Drug Administration's page on direct-to-consumer tests is blunt about the next step: “results from direct-to-consumer tests should always be discussed with your health care provider”.
That is the job this report is built for: the thing you bring to the appointment.
Your data
What happens to the file after you upload it
It is encrypted in transit and at rest. We never sell data that identifies you, and if de-identified data is ever shared for research this site will say so first. You can delete your account and everything in it yourself from Settings, with no email request and no waiting period: delete your data.
MarkerView never signs in to your Ancestry account. What happens to your genetic data · Trust & Privacy
Questions people actually ask
AncestryDNA questions
Does my AncestryDNA version matter?
No. Whichever array version you were tested on, the export has the same five columns, and nothing in MarkerView branches on the version. An older file is not a worse file; it may carry a different set of markers.
Can I combine my Ancestry file with a 23andMe file?
Yes, on Comprehensive, and exactly one of each: two Ancestry files are refused. The two must overlap on at least 10,000 usable markers and agree on at least 97% of them, or we stop rather than blend two people into one report. That is a consistency check, not identity verification. Markers where the arrays disagree are dropped. The 23andMe side.
Can I upload my ethnicity results instead?
No. The ethnicity estimate is Ancestry's interpretation, not your data. MarkerView needs the raw data download — the file with the rsid, chromosome and position columns. A PDF, a screenshot or an ethnicity export is refused at the door.
ZIP or TXT?
Either. The .zip exactly as Ancestry sent it is the easier path, and much smaller. If you have already unzipped it, upload the .txt.
Ready when your file is.
$10 for the DNA report from your Ancestry file. $20 for the full picture — DNA, medications, supplements and lab work read together, plus the optional second vendor file. One time, no subscription. Already bought Basic? Upgrade from your dashboard for $10; nothing to re-upload.
References
- Ancestry. Terms and Conditions, DNA Services. ancestry.com/c/legal/termsandconditions
- Ancestry Corporate. Company Facts. ancestry.com/corporate/about-ancestry/company-facts
- U.S. Food and Drug Administration. Direct-to-Consumer Tests. fda.gov/medical-devices/in-vitro-diagnostics/direct-consumer-tests
- Tandy-Connor S, Guiltinan J, Krempely K, et al. False-positive results released by direct-to-consumer genetic tests highlight the importance of clinical confirmation testing for appropriate patient care. Genetics in Medicine, 2018. pmc.ncbi.nlm.nih.gov/articles/PMC6301953
- MedlinePlus Genetics, U.S. National Library of Medicine. What is direct-to-consumer genetic testing? medlineplus.gov/genetics/understanding/dtcgenetictesting/directtoconsumer
Have a 23andMe file? Start here. Not sure which you have? The general raw-DNA page covers both.