rs8187974

A SNP in the ALDH1A1 gene on chromosome 9. Its most notable genotype is A;A: Greater alcohol consumption

Gene
ALDH1A1
Location
Chr 972,911,950 (GRCh38)
Highest magnitude
2.1Worth knowing
Tested on
23andMe, AncestryDNA, FamilyTreeDNA
Minor allele frequency
<1%

Genotypes

Plus strand, as in 23andMe and AncestryDNA files.

  1. C;CGoodcommon in complete genomicsTypical · 0.099% of people
  2. A;AMost notableBadGreater alcohol consumptionWorth knowing · 2.1<1% of people

SNPedia records rs8187974 on the minus strand: (G;G), (T;T). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.

Frequency

Share of each genotype in 6 HapMap populations.

  • AverageC;C 99% A;A <1%
  • European ancestry (Utah)C;C 98% A;A 2%
  • Han Chinese (Beijing)C;C 100% A;A 0%
  • Japanese (Tokyo)C;C 100% A;A 0%
  • Yoruba (Nigeria)C;C 100% A;A 0%
  • Luhya (Kenya)C;C 99% A;A 0%
  • Maasai (Kenya)C;C 96% A;A 0%

Source and license

Adapted from rs8187974 on SNPedia, using a snapshot taken October 16, 2026. SNPedia content is shared under CC BY-NC-SA 3.0 US, and this page is shared under the same license.

SNPedia is a community-edited wiki. Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice. Magnitude is a community rating of how interesting a genotype is, not a risk score.