What your raw DNA file says about food

Short, sourced guides to single markers you can look up in your own 23andMe, AncestryDNA, MyHeritage or FamilyTreeDNA raw data file. Each page tells you which rsID to find, which letters mean what, how common each result is, and where the evidence stops.

Start here

How to download your raw DNA file

Where the download button is at 23andMe, AncestryDNA, MyHeritage and FamilyTreeDNA, from each company's help pages.

Marker guides

Lactose intolerance: LCT / MCM6 rs4988235

Does your file show whether you still make lactase as an adult?

Alcohol flush: ALDH2 rs671

The marker behind facial flushing after a drink.

Caffeine: CYP1A2 rs762551 and AHR rs4410790

How fast you clear caffeine, and how much you tend to drink.

Bitter taste: TAS2R38 rs713598

Why broccoli tastes harsher to some people.

Vitamin B12 readings: FUT2 rs601338

Secretor status and how a total B12 blood test reads.

MTHFR: rs1801133 (C677T) and rs1801131 (A1298C)

What the most-searched gene actually shows, and what it does not.

How these pages are written

Letters are given as consumer files report them (the forward or "plus" strand), so you can match them against your own file directly.
Every scientific statement links to its source on PubMed. Population frequencies come from the 1000 Genomes Project via Ensembl.
If most people in any major ancestry group carry a result, we call it common, not a risk.
One marker is never the whole story. These pages are educational, not a diagnosis.

Genomeats reads these markers on your phone — nothing is uploaded. Coming soon to the App Store.