AncestryDNA MTHFR raw data
Does AncestryDNA test MTHFR?
AncestryDNA is not a clinical MTHFR test, but its raw data export can often be searched for common MTHFR markers. GenoSight can check a compatible AncestryDNA file and turn supported findings into a cautious educational methylation report.
What to search
Start with exact rsIDs, then interpret carefully.
- MTHFR C677T: rs1801133
- MTHFR A1298C: rs1801131
- COMT Val158Met context: rs4680
- Coverage varies by file and chip version
The practical answer
People use "test MTHFR" to mean several different things. For AncestryDNA, the useful path is raw-data marker lookup followed by context-aware interpretation, not a single-SNP verdict.
AncestryDNA is not a clinical MTHFR test
AncestryDNA is built around ancestry, traits, and matching. A downloaded raw data file can be useful for educational re-analysis, but it is not clinical confirmation.
Use the raw data file, not an ethnicity report
Ancestry says DNA Data is downloadable as a text file. For MTHFR lookup, you need that raw genotype file, not screenshots, family trees, or ethnicity results.
Check marker coverage directly
The common MTHFR markers people search for are C677T rs1801133 and A1298C rs1801131. Coverage can change by chip version, so check the file rather than assuming.
Source boundaries
Ancestry describes DNA Data as uninterpreted raw data that can be downloaded as a text file, and says the downloaded copy is no longer protected by Ancestry account security. Keep the file private and treat all re-analysis as educational context.
Three safe next steps
Download the right file
Use the AncestryDNA raw data download, not a PDF, screenshot, or family tree export.
ContinueRead the C677T guide
Use the AncestryDNA rs1801133 page to keep marker lookup, coverage, and interpretation boundaries separate.
ContinueRun the educational report
Use GenoSight when you want MTHFR framed alongside COMT, B vitamins, goals, caveats, and citations.
ContinueAncestryDNA and MTHFR questions
Does AncestryDNA include MTHFR in raw data?
Many AncestryDNA raw files include common MTHFR markers, but coverage can vary by test version and provider updates. The safest answer is to search the raw file for rs1801133 and rs1801131 or use a local marker checker.
Where do I find AncestryDNA raw data?
Ancestry says the test owner can request DNA Data from DNA Settings, confirm the request, verify the account, and receive an email link. The downloaded file is typically named dna-data-date.zip.
Can GenoSight read AncestryDNA raw data for MTHFR?
Yes. GenoSight can analyze compatible AncestryDNA raw data files and frame MTHFR alongside COMT, folate, B-vitamin context, goals, and report caveats. It is educational only, not diagnosis or prescribing advice.
Why do AncestryDNA letters sometimes differ from other sites?
Ancestry states that it reports SNP calls on the genomic forward strand with respect to GRCh37. Other tools may display variants differently, so GenoSight separates marker detection from interpretation.