AGT rs699: What Your Genotype Means
The rs699 variant is a well-studied genetic change in the AGT gene, which provides instructions for making a protein involved in blood pressure regulation. It is frequently investigated for its statistical association with plasma angiotensinogen levels and susceptibility to essential hypertension.
What each genotype means
Baseline angiotensinogen profile
This genotype represents the ancestral form of the AGT gene at this position. Research into its association with essential hypertension and cardiovascular risk has yielded mixed results across different global populations, with some studies suggesting it may be less associated with elevated risk compared to the T allele. Please discuss any concerns regarding blood pressure or cardiovascular health with your clinician.
This genotype is common in many populations, though its frequency varies significantly by ancestry, being less prevalent in East Asian populations where the T allele is dominant.
Intermediate angiotensinogen profile
Carrying one copy of the T allele is associated with variations in plasma angiotensinogen levels in some studies. While some research links this variant to an increased susceptibility to essential hypertension or congenital heart defects in specific groups, the evidence remains inconsistent across different ethnic backgrounds. You should consult with your healthcare provider to interpret this in the context of your overall cardiovascular health.
This is a very common genotype found globally, appearing frequently in both European and East Asian populations.
Elevated angiotensinogen risk profile
The TT genotype, often referred to as the 235T variant, has been extensively studied for its association with higher plasma angiotensinogen levels and potential susceptibility to essential hypertension. While some studies indicate a stronger association with cardiovascular risk or congenital heart defects in certain populations, other research shows no significant link, reflecting the complexity of genetic influence on blood pressure. Please discuss your cardiovascular risk factors and any medication responses, such as to atenolol, with your clinician or pharmacist.
This genotype is highly prevalent in East Asian populations and is also commonly found in European and other global populations.
Understanding the rs699 Variant
The rs699 variant, often referred to in scientific literature as the M235T polymorphism, is a single nucleotide polymorphism (SNP) located within the AGT gene on chromosome 1. This specific genetic change involves a substitution of one DNA building block for another, which results in an amino acid change in the resulting protein. Because this variant is located in a protein-coding region, it is classified as a missense variant. Researchers have tracked this site for decades to understand how subtle changes in our genetic code might influence physiological processes. While it is a common point of interest in cardiovascular research, it is important to remember that rs699 is just one of many genetic and environmental factors that contribute to complex traits like blood pressure regulation.
The Role of the AGT Gene
The AGT gene encodes a protein called angiotensinogen, which is primarily produced in the liver. Angiotensinogen is a critical component of the renin-angiotensin system, a hormone system that plays a central role in regulating blood pressure and fluid balance in the body. When blood pressure drops, the kidneys release an enzyme called renin, which cleaves angiotensinogen to begin a cascade of chemical reactions. This process eventually leads to the production of angiotensin II, a potent hormone that causes blood vessels to constrict and encourages the body to retain salt and water, thereby raising blood pressure. Because the AGT protein is the precursor for this entire system, variations in the gene that alter the protein's structure or expression levels are hypothesized to influence how efficiently this system operates.
Research and Evidence Strength
Scientific research has explored the link between the rs699 variant and various cardiovascular conditions, including essential hypertension and coronary artery disease. Many studies have observed that certain alleles of this variant are associated with higher plasma angiotensinogen levels and increased blood pressure readings. However, the evidence strength for these associations is considered limited or mixed. While some large-scale meta-analyses have found statistically significant correlations, other studies have yielded conflicting results, likely due to differences in study design, population ancestry, and the influence of environmental factors like diet and lifestyle. Because hypertension is a multifactorial condition, it is rarely determined by a single genetic variant. Consequently, while rs699 is a useful marker for research, it is not currently used as a standalone diagnostic tool for predicting individual health outcomes.
Population Frequency
The rs699 variant is considered a common polymorphism, though its frequency varies significantly across different global populations. In European populations, the minor allele frequency is approximately 0.40, while in East Asian populations, it is often observed at frequencies greater than 0.70. These differences highlight the importance of considering ancestry when interpreting genetic data. Because the variant is so common, it is present in a large portion of the general population, which underscores that carrying a specific genotype is not a definitive indicator of disease risk. Instead, it represents a normal variation in the human genome that may contribute to the wide range of blood pressure profiles observed across different human groups.
What This Information Means for You
If you have received information about your rs699 genotype, it is important to view it within the context of your overall health. Genetic associations are statistical observations made across large groups of people and cannot predict the health of an individual. Many factors, including physical activity, sodium intake, stress levels, and other genetic variants, play a much larger role in determining your blood pressure than any single SNP. You cannot use this information to diagnose yourself or to make decisions about medical treatment. If you have concerns about your blood pressure or cardiovascular health, the most effective step is to consult with a healthcare professional. They can provide a comprehensive assessment based on your clinical history and current health status. Never change or stop any prescribed medication based on genetic test results without first discussing it with your clinician or pharmacist.
How common is this variant?
The rs699 variant is a common polymorphism with a minor allele frequency of approximately 0.40 in Europeans and over 0.70 in East Asian populations.
Frequently asked questions
Is rs699 a cause of high blood pressure?
No, rs699 is not a direct cause of high blood pressure. It is a genetic variant associated with statistical differences in blood pressure regulation, but hypertension is a complex condition influenced by many genetic and environmental factors.
Should I be worried if I have the TT genotype?
No, you should not be worried. Genetic variants like rs699 are common in the population and represent normal human diversity. Your overall health is determined by a combination of many factors, not just one genetic marker.
Can I use this result to choose a blood pressure medication?
No. Genetic test results should not be used to select or adjust medications. Always discuss your treatment plan and any concerns about medication with your doctor or pharmacist.
Where can I find more information about my specific genetic results?
You should discuss your genetic results with a qualified healthcare provider or a genetic counselor. They can help you interpret the information in the context of your personal and family medical history.
Sources & further reading
Educational information only, last refreshed 9/21/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This variant is identified as a pathogenic mutation linked to renal dysplasia.