PNPLA3 rs73885319: Fatty Liver Disease Risk
The rs73885319 variant in the PNPLA3 gene is associated with an increased risk of non-alcoholic fatty liver disease (NAFLD) and liver fat accumulation. While common across many populations, understanding its implications is key for liver health awareness.
What each genotype means
Baseline liver fat risk
This genotype represents the common, non-risk version of the PNPLA3 gene. Individuals with this profile do not carry the specific genetic variation associated with increased susceptibility to non-alcoholic fatty liver disease (NAFLD) and hepatic fat accumulation.
This is the most common genotype in many global populations, though frequencies vary significantly by ancestry.
Increased liver fat risk
Carrying one copy of the G allele is associated with a moderate increase in the risk of developing non-alcoholic fatty liver disease (NAFLD) and higher levels of liver fat compared to those without the variant. This variant, often referred to as the I148M mutation, influences how the liver processes triglycerides. You should discuss your overall liver health and metabolic risk factors with your clinician.
This heterozygous genotype is common, with the G allele frequency reaching up to 0.49 in some Hispanic populations and lower frequencies in European and African populations.
High liver fat risk
Carrying two copies of the G allele is strongly associated with an increased risk of non-alcoholic fatty liver disease (NAFLD), higher hepatic triglyceride levels, and potential progression to more severe liver conditions. Research indicates that individuals with this genotype may have more than double the hepatic fat content compared to non-carriers. It is recommended that you discuss your liver health, metabolic profile, and lifestyle factors with your healthcare provider.
This homozygous genotype is most frequently observed in populations with higher susceptibility to NAFLD, such as those of Hispanic ancestry.
Understanding the PNPLA3 Gene and rs73885319
The PNPLA3 gene provides instructions for making a protein involved in fat metabolism and storage within liver cells. Variations in this gene can influence an individual's susceptibility to liver fat buildup. rs73885319 is a single nucleotide polymorphism (SNP), a common type of genetic variation where a single DNA building block differs at a specific location. This particular SNP is situated within the PNPLA3 gene, making it a significant focus for research into liver health due to its potential impact on the PNPLA3 protein's function and its subsequent effects on lipid metabolism in the liver.
Research Associations: Fatty Liver Disease
Research has established a moderate-strength association between the rs73885319 variant and an elevated risk of non-alcoholic fatty liver disease (NAFLD). NAFLD is characterized by excess fat accumulation in the liver, unrelated to heavy alcohol consumption. Studies indicate that individuals with certain genotypes of rs73885319 are more prone to developing liver fat and may face a higher likelihood of progressing to more severe liver conditions like non-alcoholic steatohepatitis (NASH), fibrosis, or cirrhosis. The evidence supporting this link is derived from numerous population-based studies and meta-analyses that have consistently observed this association across diverse ethnic groups.
Prevalence Across Populations
The rs73885319 variant is considered common and is found in a wide range of human populations globally. While its overall presence is high, the frequency of specific genotypes can differ depending on an individual's ancestry. Some research suggests that certain ancestral groups may exhibit a higher prevalence of the alleles linked to increased liver fat risk compared to others. This widespread distribution implies that a substantial portion of the global population may carry at least one copy of this variant, highlighting its potential relevance to public health concerning liver conditions.
What You Can and Cannot Do With This Information
Knowing your rs73885319 genotype can offer insights into your genetic predisposition towards liver fat accumulation and NAFLD. This knowledge can facilitate more informed discussions with healthcare providers about liver health, potential lifestyle adjustments, and the importance of regular monitoring, particularly if other risk factors are present. However, a genetic predisposition does not predetermine the development of a condition; it merely indicates an increased likelihood. This information should never be used for self-diagnosis or to guide medical treatment decisions without consulting a qualified healthcare professional. Genetic results are one component of overall health and should be interpreted alongside medical history and lifestyle factors.
How common is this variant?
rs73885319 is a common variant found in many populations. Genotype frequencies can vary based on ancestry, with some groups showing a higher prevalence of specific alleles associated with increased liver fat.
Frequently asked questions
What is rs73885319?
rs73885319 is a common genetic variation, specifically a single nucleotide polymorphism (SNP), found in the PNPLA3 gene. It is linked to how your body metabolizes fats in the liver.
Does having a specific rs73885319 genotype mean I will get fatty liver disease?
No, it does not guarantee you will develop fatty liver disease. It means you may have a higher genetic predisposition or risk compared to someone with a different genotype. Lifestyle factors play a significant role.
How common is rs73885319?
This variant is common and found in many populations around the world. The frequency of specific genotypes can vary depending on an individual's ancestry.
Should I get tested for rs73885319?
Deciding whether to get tested is a personal choice. If you have concerns about liver health or a family history of liver disease, discussing genetic testing with your doctor might be helpful.
Can I change my rs73885319 genotype?
No, your genetic makeup, including your rs73885319 genotype, is inherited and cannot be changed. However, you can take steps to manage your liver health through lifestyle choices.
Sources & further reading
Educational information only, last refreshed 10/3/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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The p.Ile148Met variant in PNPLA3 is a major genetic determinant of hepatic fat content and NAFLD risk.
Intronic regulatory variant in linkage disequilibrium with I148M associated with hepatic fat fraction and ALT levels.
This variant is in high linkage disequilibrium with the I148M (rs738409) variant, which is a major genetic determinant of hepatic fat content and susceptibility to NAFLD.
The PNPLA3 S453I variant is a rare variant associated with hepatic lipid metabolism; note that the common risk variant for NAFLD is rs738409.
An intronic variation in linkage disequilibrium with the major PNPLA3 non-alcoholic fatty liver disease (NAFLD) locus that contributes to individual liver fat accumulation and fibrosis predisposition.
The PNPLA3 I148M variant is a major genetic risk factor for non-alcoholic fatty liver disease (NAFLD) and progression to cirrhosis.