More than two thousand positions have been linked to blood pressure and together they still lose to a cuff on your arm. Both variants here come from an east Asian study — unusual on a site whose evidence is mostly European — and one of them sits beside the alcohol-flush locus.
Blood pressure is the trait where genetics has to be honest about its place. It is highly heritable, it has been studied in over a million people, and none of that competes with the thing anyone can do in two minutes: put a cuff on an arm and read the number.
A 2018 study of more than a million people added 535 new blood-pressure loci in one paper. The count has since passed 2,000, and a 2025 review of the field says plainly that the causal genes and pathways behind most of them remain largely unknown.
Each of those positions moves blood pressure by a fraction of a millimetre of mercury. A reading tells you what your blood pressure actually is, today, including everything genetics cannot see — salt, weight, sleep, alcohol, stress, kidney function, the medicines you already take. That is why no guideline anywhere asks for a genotype before treating high blood pressure, and why this page cannot be used to decide anything.
Most of the evidence on this site was gathered in people of European descent, and we say so on the pages where it matters. This page is the exception.
Both variants come from a meta-analysis in the AGEN-BP consortium: 19,608 people of east Asian ancestry, with new genotyping in 10,518 more and replication in a further 20,247.
That same study found something striking: a very strong blood-pressure signal at chromosome 12q24.13, near ALDH2, with p-values of 7.9 x 10-31 and 1.3 x 10-35 — and it was ethnically specific, showing up in east Asians rather than in European-ancestry samples.
ALDH2 is the gene behind the alcohol flush reaction, and the variant that causes it is common in east Asia and almost absent elsewhere. A gene that governs how much alcohol a person can comfortably drink turning up as a blood-pressure locus in exactly the population where that gene varies is not a coincidence waiting to be explained — alcohol raises blood pressure, and this looks like that effect written into the genome.
It is also a good demonstration of why studying only one ancestry misses things. This signal is invisible in European-ancestry data because the variant is not there to be seen.
Everything that works is already known and none of it requires a test: knowing your numbers, salt, weight, alcohol, movement, sleep, and taking prescribed medicines as prescribed. High blood pressure is common, usually silent, and one of the most treatable causes of stroke and heart disease there is.
If it has been a while since anyone measured yours, that — not this page — is the useful next step.
Architecture. Blood pressure is a continuous, highly polygenic trait. The 2018 meta-analysis in over one million individuals of European ancestry reported 535 novel loci for systolic, diastolic and pulse pressure, and highlighted shared genetic architecture between blood pressure and lifestyle exposures. Reviews now put the total above 2,000 loci, with causal genes and mechanisms unresolved for most. Per-variant effects are on the order of a fraction of a mmHg, and polygenic scores for blood pressure are not used in clinical decision-making.
The two variants here. Both are recorded from the AGEN-BP meta-analysis of GWAS for systolic and diastolic blood pressure in 19,608 east Asian subjects, with de novo genotyping in 10,518 and further replication in 20,247 east Asian samples. That study identified new loci at ST7L-CAPZA1, FIGN-GRB14, ENPEP and NPR3 plus a newly discovered variant near TBX3 (rs35444 here), replicating all but NPR3 in independent samples, and confirmed seven loci previously identified in European-descent populations — the group ATP2B1 (rs17249754) belongs to. ATP2B1 encodes plasma membrane calcium ATPase 1, expressed in vascular smooth muscle and endothelium, where calcium handling is directly relevant to vascular tone; TBX3 is a T-box transcription factor with established roles in cardiac conduction and limb development, and its blood-pressure mechanism is not established.
The ALDH2 signal. The same study reported strong association at 12q24.13 near ALDH2 (P = 7.9 x 10-31 for SBP, 1.3 x 10-35 for DBP) with ethnic specificity. The functional ALDH2 Glu504Lys variant is common in east Asian populations and effectively absent elsewhere, and alcohol intake is an established determinant of blood pressure; the region is also in extended linkage disequilibrium across 12q24, so the precise causal variant is not settled by association alone. It is a clean example of an ancestry-specific signal that European-ancestry studies cannot detect.
Clinical position. Diagnosis and management of hypertension rest on measurement — office readings confirmed by home or ambulatory monitoring — plus assessment for secondary causes and overall cardiovascular risk. No guideline incorporates common blood-pressure variants into diagnosis, risk stratification or drug choice, and nothing on this page modifies any of that.
What a 23andMe/AncestryDNA export or raw VCF can and can't tell you about Blood Pressure comes down to these specific, well-studied positions — not a diagnosis.
Not usefully. Thousands of positions each move it by a fraction of a millimetre of mercury, and none of that competes with measuring it. A cuff tells you what your blood pressure is today, including everything genetics cannot see.
Because that is where they were found — and it is unusual for this site, where most evidence comes from European-ancestry cohorts. One of the two, near TBX3, was newly discovered in that study; the other, ATP2B1, was found in European-ancestry work first and confirmed there.
The same east Asian study found a very strong blood-pressure signal beside ALDH2, and only in east Asians — because the variant that causes flushing is common there and almost absent elsewhere. Alcohol raises blood pressure, so a gene governing how much a person drinks comfortably turning up here is the mechanism, not a puzzle.
No. Nothing here changes a diagnosis, a target or a medicine. If your blood pressure has not been measured recently, that is the useful next step, and it is the same advice whatever these positions say.
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