CETP rs9923854: Longevity and Healthspan Associations
The rs9923854 variant is a single nucleotide polymorphism located in the promoter region of the CETP gene. It has been studied for its potential associations with high-density lipoprotein (HDL) cholesterol levels, cognitive preservation, and exceptional human longevity.
What each genotype means
Typical CETP longevity profile
You carry two copies of the common C allele at rs9923854, which represents the standard baseline reference profile for this CETP locus. In European cohort studies, this genotype has not been linked to the modestly increased HDL cholesterol levels or increased odds of exceptional longevity observed with the T allele. Overall scientific evidence linking this individual marker to lifespan and cognitive preservation remains limited and cohort-dependent.
Carried by approximately 35% to 45% of individuals of European ancestry and is the most common genotype in many global populations.
Intermediate longevity association
You carry one copy of the longevity-associated T allele and one copy of the C allele at rs9923854. Some European candidate-gene studies have linked this heterozygous genotype to intermediate CETP activity, slightly higher HDL cholesterol levels, and modest positive associations with healthy aging. However, these associations are statistically weak or borderline across different populations, indicating limited overall predictive impact.
Carried by approximately 45% to 50% of people of European descent.
Elevated longevity and HDL association
You carry two copies of the T allele at rs9923854, which has been statistically associated in European cohorts with higher HDL cholesterol levels, preserved cognitive performance in aging, and exceptional longevity. Despite these positive epidemiological observations, evidence remains classified as limited because replication across non-European cohorts and large meta-analyses has been mixed. This genetic marker does not diagnose health status or guarantee longevity on its own.
Carried by roughly 12% to 18% of individuals of European ancestry.
Understanding the Variant and Its Location
The rs9923854 variant is a specific change in the DNA sequence found within the CETP gene. This gene is located on chromosome 16 and provides instructions for making the cholesteryl ester transfer protein. The rs9923854 SNP is situated in the promoter region, which is the part of the gene that acts like a switch to control how much of the protein is produced. Because it sits in this regulatory area, researchers hypothesize that this variant may influence the expression levels of the CETP protein rather than changing the structure of the protein itself. Geneticists study such variants to understand how subtle differences in gene regulation can contribute to variations in human health and aging processes across different populations.
The Role of the CETP Gene
The CETP gene encodes the cholesteryl ester transfer protein, which plays a central role in lipid metabolism. This protein facilitates the transfer of cholesteryl esters from high-density lipoprotein (HDL) particles to other lipoproteins, such as low-density lipoprotein (LDL) and very-low-density lipoprotein (VLDL). By moving cholesterol between these particles, CETP helps regulate the composition and size of circulating lipoproteins. Because HDL is often referred to as 'good' cholesterol due to its role in transporting cholesterol away from tissues and back to the liver, the activity of CETP is a major focus in cardiovascular research. Variations that reduce the activity or concentration of CETP are often associated with higher levels of HDL cholesterol, which has led to significant interest in whether these genetic differences influence long-term health outcomes.
Research on Longevity and Cognitive Function
Research into rs9923854 and other CETP variants has explored their potential links to healthy aging. Some studies have suggested that certain CETP genotypes are more common in centenarians and may be associated with the preservation of cognitive function in older age. The evidence for these associations is considered limited and sometimes inconsistent across different ethnic groups. While some cohorts have shown a correlation between specific CETP profiles and longevity, other studies have failed to replicate these findings or have observed different results depending on the population's genetic background. It is important to recognize that longevity is a complex trait influenced by a vast array of genetic, environmental, and lifestyle factors. Consequently, a single SNP like rs9923854 is unlikely to be a sole determinant of lifespan or cognitive health, and current scientific consensus emphasizes that these associations require further validation.
Population Frequency and Interpretation
The rs9923854 variant is relatively common, particularly in European populations, where the minor allele frequency is typically reported between 0.35 and 0.42. Because this variant is widespread, it is considered a common genetic polymorphism rather than a rare mutation. When interpreting information about this SNP, it is crucial to understand that statistical associations observed in large research studies do not equate to individual medical predictions. A person's genotype at this locus does not guarantee any specific health outcome, such as exceptional longevity or a particular cholesterol profile. Readers should view this information as a window into ongoing scientific research rather than a diagnostic tool. If you have concerns about your cholesterol levels or cognitive health, it is essential to consult with a qualified healthcare professional who can evaluate your overall health status, family history, and clinical test results.
How common is this variant?
The rs9923854 variant is common in European populations, with a minor allele frequency typically ranging from approximately 0.35 to 0.42.
Frequently asked questions
Does the rs9923854 variant guarantee a long life?
No. Longevity is a complex trait influenced by many genes, environmental factors, and lifestyle choices. A single genetic variant cannot predict an individual's lifespan.
Can I use this SNP to diagnose my risk of Alzheimer's disease?
No. While some studies have investigated links between CETP variants and cognitive function, this SNP is not a diagnostic test for Alzheimer's disease or any other condition. Always consult a physician for medical concerns.
How does CETP affect my cholesterol levels?
CETP helps move cholesterol between different types of lipoproteins in the blood. Genetic variations that affect CETP can influence the levels of HDL cholesterol, but individual lipid profiles are also heavily impacted by diet, exercise, and other factors.
Where can I find more information about my specific genotype?
If you have received genetic testing results, you should discuss them with a genetic counselor or your primary care physician. They can help you interpret the data in the context of your overall health.
Sources & further reading
Educational information only, last refreshed 10/11/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs9923854?
Upload a raw DNA file from 23andMe, AncestryDNA, MyHeritage, or FamilyTreeDNA and see this variant — plus thousands more — interpreted in your full report.
Get my report — $29Related variants in CETP
The B2 (A) allele of the TaqIB polymorphism is associated with lower CETP activity and significantly higher HDL-cholesterol levels.
The missense variant p.Ile422Val (I405V) in CETP is associated with reduced cholesteryl ester transfer protein activity, leading to elevated HDL-C levels and modest protection against coronary artery disease.
The I405V variant in CETP is associated with altered HDL cholesterol levels and cardiovascular risk profiles.
Well-established regulatory intronic polymorphism modulating cholesteryl ester transfer protein activity and circulating HDL cholesterol levels.
Known as the CETP TaqIB polymorphism, this intron variant is linked to reduced CETP activity, higher circulating HDL-C, and altered cardiovascular risk profile.
The I405V coding variant in cholesteryl ester transfer protein correlates with diminished CETP mass, elevated HDL cholesterol levels, and potential longevity benefits.