rs838133

A SNP in the FUT1 gene on chromosome 19. Its most notable genotype is A;A: Sweet Tooth; Higher odds of preferring candy

Gene
FUT1
Location
Chr 1948,756,272 (GRCh38)
Highest magnitude
1.4Minor
Tested on
23andMe, AncestryDNA
Minor allele frequency
25%

Genotypes

Plus strand, as in 23andMe and AncestryDNA files.

  1. G;GNot ratedLower odds of preferring candy or sweet snacksMinor · 1.159% of people
  2. A;GNot ratedSweeth tooth tendency; slightly higher odds of preferring candyMinor · 1.233% of people
  3. A;AMost notableNot ratedSweet Tooth; Higher odds of preferring candyMinor · 1.48% of people

SNPedia records rs838133 on the minus strand: (C;C), (C;T), (T;T). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.

Frequency

Share of each genotype in 10 HapMap populations.

  • AverageG;G 59% A;G 33% A;A 8%
  • European ancestry (Utah)G;G 26% A;G 53% A;A 21%
  • Han Chinese (Beijing)G;G 97% A;G 3% A;A 0%
  • Japanese (Tokyo)G;G 99% A;G <1% A;A 0%
  • Yoruba (Nigeria)G;G 50% A;G 45% A;A 6%
  • African ancestry (Southwest US)G;G 47% A;G 40% A;A 12%
  • Gujarati IndianG;G 63% A;G 34% A;A 3%
  • Luhya (Kenya)G;G 61% A;G 33% A;A 7%
  • Mexican ancestry (Los Angeles)G;G 64% A;G 29% A;A 7%
  • Maasai (Kenya)G;G 54% A;G 40% A;A 7%
  • TuscanG;G 29% A;G 49% A;A 22%

Other FUT1 SNPs

All FUT1 SNPs

Notes

From SNPedia

Show notes, about 120 words

A 2017 study of ~6,500 individuals with detailed eating records concluded that the rs838133(T) allele (in SNPedia and dbSNP orientation) increased the odds ratio (OR) of being in the top 33% of people for total intake of all types of sweet-tasting foods, with an OR of 1.18 per T-allele (CI: 1.06–1.32, p = 0.003). When sweet intake was divided into “candy” and “cake,” individuals carrying the T-allele had higher candy intake (OR 1.19, CI: 1.07–1.32, p = 0.0007), whereas intake of cake was the same regardless of rs838133 genotype. “Genetic associations with traits in 23andMe customers.” 23andMe White Paper. Salty or sweet - 23andMe blog entry

G;G

See rs838133 for discussion

A;G

see rs838133 for discussion

A;A

see rs838133 for discussion

Source and license

Adapted from rs838133 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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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.