{{Rsnum
|rsid=1050891
|Gene=HNMT
|Summary=ADHD and food dye sensitivity
|Chromosome=2
|Orientation=minus
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|position=138014190
|Gene_s=HNMT
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
}}This SNP is part of the [[HNMT]] gene known as C939T (or 939A>G) that regulates histamine.  According to {{PMID|20551163}} the lack of a C allele for this gene indicates an increase in ADHD behavior for children age 3 and 8/9 when they have been exposed to certain food additives: sunset yellow, carmoisine, tartrazine, ponceau 4R, quinoline yellow, allura red AC and sodium benzoate

{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | HumanOmni1Quad}}