Markers / Gene
GSTP1
One position in this gene is readable from a home DNA test.
One of the enzymes that mops up reactive chemicals
rs1695 · chr11:67,352,689 · A/G · evidence: moderate
Glutathione S-transferases attach a handle to reactive molecules so the body can throw them out. They handle smoke, cooked food, industrial solvents and the by-products of your own metabolism. This is the most studied position in the family.
| If you carry | What it means |
|---|---|
| No copies | You have the standard version on both copies |
| One copy | You carry one variant copy |
| Two copies | You have the variant version on both copies |
| Ancestry group | G (the effect version) | |
|---|---|---|
| African | 48.0% | |
| American | 47.6% | |
| East Asian | 17.9% | |
| European | 33.1% | |
| South Asian | 29.4% |
1000 Genomes Project phase 3, via Ensembl, retrieved 2026-09-23. These groupings are coarse and flatten a great deal of internal diversity, particularly within Africa. A variant being common somewhere tells you where a piece of your ancestry probably comes from, and nothing else.
If you have taken a home DNA test, these positions are already in your file.
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