Lactose intolerance DNA test
Check lactase persistence from the raw DNA file you already have.
GenoSight can re-analyze a compatible 23andMe, AncestryDNA, or MyHeritage raw DNA file for supported lactose-related markers, then explain the result in an educational food-response report.
Foods & Drinks report
160 credits; free signup grant is 250 credits.
What a lactose DNA report can show
Lactose genetics is mostly about whether lactase production tends to persist into adulthood. That is useful context, but it is not the same thing as diagnosing why your stomach reacts to dairy.
LCT / MCM6 region
Lactase persistence markers
GenoSight checks supported raw-file markers around the LCT regulatory region, including commonly used MCM6-region variants when present.
Report fit
Foods & Drinks or Gut Health
Lactose context can appear in the Foods & Drinks report and overlaps with Gut Health when digestion is the larger question.
Personal context
Symptoms still matter
Milk, yogurt, hard cheese, lactose-free dairy, gut history, and current symptoms can matter more than a single marker.
Report paths
Start with the smaller food-response reports.
Lactose-related context fits inside reports that the no-card signup grant can cover. Upgrade only when you want a wider nutrition library or ongoing report generation.
Foods & Drinks report
160 creditsBest first stop for lactose, caffeine, alcohol, taste, histamine, omega-3, and other food-response genetics.
ContinueGut Health report
160 creditsBest when lactose is part of a broader digestion question such as celiac tag SNPs, histamine clearance, or gut barrier context.
ContinueNutrition report
350 creditsA deeper paid-intent report for broader nutrient and food metabolism questions beyond lactose alone.
ContinueWhat GenoSight can explain
Check whether supported lactase persistence markers are present in your raw DNA file
Explain lactose-related genetic context with caveats and source notes
Place lactose context beside adjacent food-response and gut-health findings
Start with a report that fits inside the no-card signup credit grant
What it should not do
Diagnose lactose intolerance, milk allergy, IBS, celiac disease, or any gastrointestinal condition
Replace a clinician-ordered breath test, elimination challenge, blood work, or specialist evaluation
Tell you exactly which dairy foods to eat or avoid
Analyze PDF reports, screenshots, FASTQ, BAM, or whole-genome VCF files
Lactose DNA test questions
Common questions before checking lactase persistence markers.
Can I use 23andMe or AncestryDNA raw data for a lactose intolerance DNA test?
You can use a compatible 23andMe, AncestryDNA, or MyHeritage raw genotype file to check supported lactase persistence markers. GenoSight reports educational context only, not a clinical diagnosis.
Which genes are involved in lactase persistence?
The LCT gene encodes lactase, and common adult lactase-persistence markers sit in regulatory DNA near LCT, often described through the nearby MCM6 region. Coverage depends on the raw DNA file.
Can genetics prove I am lactose intolerant?
No. Genetics can indicate lactase-persistence context, but symptoms, ancestry, gut health, dairy type, serving size, and clinical testing all matter. Milk allergy and lactose intolerance are also different issues.
Can I try this before paying?
Yes. New accounts receive 250 free credits with no card required. The Foods & Drinks and Gut Health reports currently cost 160 credits each, so the free grant can cover a first lactose-related report preview.
No-card starter path
Check lactose-related context with the free credit grant.
Upload a compatible raw DNA file, generate a food-response report, and continue only if the format is useful.