{{Rsnum
|rsid=2470893
|Gene=CYP1A1
|Chromosome=15
|position=74727108
|Orientation=minus
|GMAF=0.1322
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
|Gene_s=CYP1A1
}}{{ population diversity
| geno1=(A;A)
| geno2=(A;G)
| geno3=(G;G)
| CEU | 7.1 | 50.4 | 42.5
| HCB | 0.0 | 0.7 | 99.3
| JPT | 0.0 | 0.0 | 100.0
| YRI | 0.0 | 0.0 | 100.0
| ASW | 0.0 | 17.5 | 82.5
| CHB | 0.0 | 0.7 | 99.3
| CHD | 0.0 | 0.0 | 0.0
| GIH | 0.0 | 6.9 | 93.1
| LWK | 0.0 | 0.0 | 0.0
| MEX | 3.4 | 22.4 | 74.1
| MKK | 0.0 | 5.1 | 94.9
| TSI | 3.9 | 30.4 | 65.7
| HapMapRevision=28
}}{{doi|10.1371/journal.pgen.1002033}} [[ rs4410790]] and [[rs2470893]] influence habitual [[caffeine]] consumption

{{PMID Auto GWAS
|PMID=21490707
|Trait=None
|Title=Genome-wide meta-analysis identifies regions on 7p21 (AHR) and 15q24 (CYP1A2) as determinants of habitual caffeine consumption.
|RiskAllele=T
|Pval=5E-14
|OR=0.1200
|ORtxt=[0.08-0.16] mg/day increase
|OA=1
}}

{{PMID Auto GWAS
|PMID=21876539
|Trait=None
|Title=Genome-wide association analysis of coffee drinking suggests association with CYP1A1/CYP1A2 and NRCAM.
|RiskAllele=T
|Pval=2E-11
|OR=0.0675
|ORtxt=[0.05-0.09] unit increase
|OA=1
}}

{{PMID|18691756|OA=1
}} Paternal smoking, genetic polymorphisms in CYP1A1 and childhood leukemia risk.

{{PMID|19479063|OA=1
}} Phase I metabolic genes and risk of lung cancer: multiple polymorphisms and mRNA expression.

{{PMID Auto
|PMID=22854411
|Title=Associations between polymorphisms in the AHR and CYP1A1-CYP1A2 gene regions and habitual caffeine consumption
}}

{{PMID Auto
|PMID=23492908
|Title=Influence of CYP1A1/CYP1A2 and AHR polymorphisms on systemic olanzapine exposure
}}

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | FTDNA2}}
{{on chip | FTDNA}}
{{on chip | HumanOmni1Quad}}
{{on chip | Illumina Human 1M}}