https://dnachecker.xyz/blog Practical writing about consumer DNA data: how to get your file, what is actually in it, and what can and cannot be worked out from it. en https://dnachecker.xyz/blog/celiac-disease-dna-markers https://dnachecker.xyz/blog/celiac-disease-dna-markers The HLA-DQ markers behind coeliac disease are unusual in consumer genetics — a negative result is far more informative than a positive one. Here is why, and what the file can support. Sun, 06 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/cyp2c19-clopidogrel-dna https://dnachecker.xyz/blog/cyp2c19-clopidogrel-dna Of everything readable from a consumer DNA file, how you process clopidogrel has the clearest practical use. What the star alleles mean, and what to do with the result. Sun, 06 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/free-raw-dna-analysis https://dnachecker.xyz/blog/free-raw-dna-analysis A tour of what free DNA interpretation actually covers, where the free tier usually stops, and which questions are worth checking yourself before paying anyone. Sun, 06 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/mthfr-and-your-raw-dna-data https://dnachecker.xyz/blog/mthfr-and-your-raw-dna-data MTHFR is the most widely reported gene in consumer DNA interpretation, and the one where the gap between those reports and the mainstream genetics position is widest. Sun, 06 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/wgs-vs-dna-array-file https://dnachecker.xyz/blog/wgs-vs-dna-array-file Consumer DNA kits produce array files. Sequencing produces something categorically different. Here is what each one can support, and when the upgrade is and is not worth it. Sun, 06 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/what-carrier-status-means https://dnachecker.xyz/blog/what-carrier-status-means Being a carrier says nothing about your own health and everything about a decision two people might make together. What the term means, and what a consumer file can and cannot show. Sun, 06 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/what-is-a-polygenic-risk-score https://dnachecker.xyz/blog/what-is-a-polygenic-risk-score Polygenic scores are the headline feature of most premium DNA report tiers. What they measure, why the same score behaves differently across ancestries, and how to read one honestly. Sun, 06 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/why-dna-services-disagree https://dnachecker.xyz/blog/why-dna-services-disagree Upload one raw file to two services and the reports will differ. The reasons are structural rather than accidental, and knowing them tells you which report to trust. Sun, 06 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/caffeine-metabolism-dna https://dnachecker.xyz/blog/caffeine-metabolism-dna One well-studied marker separates fast from slow caffeine metabolisers. Here is what the research supports, what it does not, and how to find the marker in your own file. Sat, 05 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/how-to-read-your-raw-dna-file https://dnachecker.xyz/blog/how-to-read-your-raw-dna-file Your raw DNA file is a plain text table with four columns. Here is what each one means, how to look up one of your own markers, and what the letters do and do not tell you. Sat, 05 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/is-it-safe-to-upload-your-dna-data https://dnachecker.xyz/blog/is-it-safe-to-upload-your-dna-data What can actually go wrong when you upload a genotype file, what to check in a service's privacy policy before you do, and what proper deletion looks like. Sat, 05 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/lactose-intolerance-dna https://dnachecker.xyz/blog/lactose-intolerance-dna One marker explains lactase persistence in European populations and misses it entirely in several others. A clear example of why coverage matters more than the result. Sat, 05 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/what-to-do-with-raw-dna-data https://dnachecker.xyz/blog/what-to-do-with-raw-dna-data You have the file. Here is what it can be used for, what the services that read it cost, which formats they take, and how to pick one without regretting it. Sat, 05 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/how-to-download-your-23andme-raw-data https://dnachecker.xyz/blog/how-to-download-your-23andme-raw-data A step-by-step guide to exporting your raw genotype file from 23andMe, what the file actually contains, and what the columns mean. Fri, 04 Sep 2026 00:00:00 GMT https://dnachecker.xyz/blog/raw-dna-file-formats-compared https://dnachecker.xyz/blog/raw-dna-file-formats-compared The raw genotype files from the major consumer DNA services differ in format, marker count and coverage. Here is what each one gives you and why it matters. Fri, 04 Sep 2026 00:00:00 GMT