MRAS rs1720825: Understanding Your Genetic Association
The genetic variant rs1720825 is a single nucleotide polymorphism located within the MRAS gene. Large-scale genome-wide association studies have linked this specific variant to variations in body mass index (BMI) across human populations.
What each genotype means
Baseline BMI association
This genotype represents the homozygous state for the major allele at this position in the MRAS gene. Large-scale genetic studies have associated variations in this gene with body mass index, though this specific genotype is considered the baseline against which other variations are measured. Individual body mass index is influenced by a complex interplay of genetics, lifestyle, and environment, so this result should not be used to predict personal health outcomes.
This is a common genotype found in many global populations, though exact frequencies vary by ancestry.
Potential BMI association
You carry one copy of the minor allele at this position in the MRAS gene. Research has linked variants in this gene to differences in body mass index, but the effect of a single copy is typically modest and contributes only a small fraction to overall weight variation. Please remember that genetic associations are statistical observations across large groups and do not determine individual health; maintain a balanced lifestyle and consult a healthcare provider for personalized health guidance.
This heterozygous genotype is observed frequently across diverse populations.
Potential BMI association
You carry two copies of the minor allele at this position in the MRAS gene. While this variant has been identified in meta-analyses as being associated with body mass index, the influence of any single genetic marker on weight is small compared to environmental and lifestyle factors. This information is for educational purposes and should not be used to make medical decisions; discuss any health concerns with your physician.
This genotype is less common than the homozygous major genotype but is still present at significant frequencies in many populations.
What is rs1720825?
The identifier rs1720825 refers to a specific location in the human genome where a single nucleotide—the building block of DNA—varies between individuals. This type of variation is known as a single nucleotide polymorphism, or SNP. Located within the MRAS gene, this variant is one of many thousands of markers that researchers track to understand the genetic architecture of complex human traits. Because the human genome is vast, scientists use these specific 'rs' (reference SNP) IDs to pinpoint exact locations on chromosomes. By comparing the DNA of large groups of people, researchers can determine if certain versions of this SNP appear more frequently in individuals who share specific physical characteristics, such as a particular body mass index range.
The Role of the MRAS Gene
The MRAS gene encodes a protein known as Muscle RAS Oncogene Homolog. This protein belongs to the RAS superfamily of small GTPases, which act as molecular switches in cells. These proteins are involved in complex signaling pathways that regulate cell growth, differentiation, and survival. While the name 'oncogene' might sound concerning, these genes perform essential, normal functions in healthy cells. In the context of metabolic research, scientists are interested in how variations in genes like MRAS might influence the signaling pathways that govern energy balance and adipose tissue development. Understanding these pathways is a major focus of modern genetics, as it helps clarify how subtle differences in protein function can contribute to the wide range of body types observed in the human population.
Research and Evidence Strength
The association between rs1720825 and body mass index is derived from genome-wide association studies (GWAS). These studies analyze the genomes of hundreds of thousands of individuals to find statistical correlations between specific SNPs and traits. The evidence for rs1720825 is considered moderate; while it has been identified in large-scale meta-analyses, it is important to recognize that BMI is a highly polygenic trait. This means that thousands of genetic variants, each with a very small individual effect, contribute to a person's BMI, alongside significant environmental and lifestyle factors. A statistical association in a GWAS does not imply that this single variant determines a person's weight. Instead, it suggests that the variant is part of a much larger, complex network of genetic influences that scientists are still working to fully map and understand.
Interpreting Your Genetic Information
It is essential to understand that genetic associations are statistical observations made at the population level, not diagnostic tools for individuals. Having a specific genotype at the rs1720825 locus does not predict a specific health outcome or body type for any single person. Genetics is only one piece of the puzzle; diet, physical activity, socioeconomic factors, and other environmental influences play a much larger role in determining body mass index. You cannot use this information to diagnose a condition or predict your future health. If you have questions about your weight, metabolic health, or how your lifestyle choices impact your well-being, the most effective approach is to consult with a qualified healthcare provider or a registered dietitian who can provide personalized guidance based on your complete health history.
How common is this variant?
The rs1720825 variant is considered a common polymorphism, meaning its different alleles are found at significant frequencies across most major human ancestral populations.
Frequently asked questions
Does having the 'risk' allele mean I will be overweight?
No. Genetic associations for BMI are statistical, meaning they describe trends across large groups of people. They do not determine an individual's weight, which is heavily influenced by diet, exercise, and environment.
Can I use this SNP to create a diet plan?
There is no scientific evidence to suggest that this specific SNP should be used to dictate dietary choices. Personalized nutrition should be discussed with a registered dietitian or doctor.
Is rs1720825 a mutation?
In genetics, the term 'variant' or 'polymorphism' is preferred for common changes like rs1720825. It is a normal variation found in the human population, not a disease-causing mutation.
Where can I find more information on MRAS?
You can search for the MRAS gene on resources like MedlinePlus Genetics or the NCBI Gene database. These sites provide detailed, peer-reviewed information on gene functions.
Sources & further reading
Educational information only, last refreshed 10/11/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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