FADS1 rs174528: What Your Genotype Means
The rs174528 variant is a common genetic change located within the FADS1 gene cluster. It is associated with variations in the plasma levels of long-chain polyunsaturated fatty acids (LC-PUFAs), which are essential for human health.
What each genotype means
Typical fatty acid metabolism
This genotype is associated with standard activity levels of the FADS1 enzyme, which helps convert dietary fats into long-chain polyunsaturated fatty acids. Research suggests this variant influences how your body processes omega-3 and omega-6 fatty acids, though individual metabolic responses can vary based on overall diet. Please discuss any concerns regarding your nutritional status or dietary needs with a qualified healthcare provider or registered dietitian.
This is a common genotype found in many global populations, though exact frequencies vary significantly by ancestral background.
Intermediate fatty acid metabolism
Carrying one copy of each allele may result in intermediate FADS1 enzyme activity compared to homozygous individuals. This variant is part of a gene cluster known to influence the levels of long-chain polyunsaturated fatty acids in the blood. Because this association is complex and influenced by dietary intake, it should not be used to make medical decisions. Consult with a clinician or nutritionist to understand how your specific diet may interact with your genetic profile.
This heterozygous genotype is frequently observed across diverse populations worldwide.
Altered fatty acid metabolism
This genotype is associated with variations in the efficiency of the FADS1 enzyme, which plays a rate-limiting role in the synthesis of long-chain polyunsaturated fatty acids. Studies indicate that individuals with this genotype may show different plasma fatty acid profiles compared to those with other genotypes, particularly in response to specific dietary fat intakes. This information is for educational purposes; please speak with a healthcare professional or pharmacist before making changes to your diet or considering supplementation.
This genotype is common in many populations, with prevalence rates that differ notably between individuals of European, African, and Asian ancestry.
Understanding the rs174528 Variant
The rs174528 variant is a single nucleotide polymorphism (SNP) located in the FADS1 gene cluster on chromosome 11. SNPs are the most common type of genetic variation among people, representing a difference in a single DNA building block. This specific variant sits within a region of the genome that is highly influential in regulating lipid metabolism. Because it is located in a gene cluster responsible for fatty acid processing, researchers have studied it extensively to understand how genetic differences contribute to the diversity of human metabolic profiles. It is considered a common variant, meaning it appears frequently across various global populations.
The Role of the FADS1 Gene
The FADS1 gene encodes the fatty acid desaturase 1 enzyme. This enzyme is a member of the FADS family, which plays a critical role in the biosynthesis of long-chain polyunsaturated fatty acids (LC-PUFAs). These enzymes function by introducing double bonds into fatty acid chains, a process known as desaturation. This conversion is essential for transforming dietary precursors into biologically active molecules like arachidonic acid and eicosapentaenoic acid. These LC-PUFAs are vital components of cell membranes and are particularly important for brain development and function. The FADS1 gene cluster is thought to have evolved through gene duplication, allowing humans to adapt their fatty acid metabolism to different dietary environments throughout history.
Research Associations and Evidence
Research has linked variants in the FADS1 region to differences in the efficiency of converting dietary fatty acids into their long-chain forms. Studies suggest that certain haplotypes in this region are associated with higher or lower levels of specific LC-PUFAs in the blood. While these associations are statistically significant in large genome-wide association studies (GWAS), the evidence regarding clinical outcomes remains limited. Researchers have explored potential links between these variants and complex traits such as cardiovascular health, lipid concentrations, and even cognitive function. However, it is important to note that these findings are often influenced by diet and environmental factors. Because of this complexity, the evidence for direct clinical impact is considered limited, and the variant should not be used to predict specific health outcomes or diagnose conditions.
What You Can Do With This Information
Genetic information regarding rs174528 provides insight into your biological predisposition for processing fatty acids, but it does not dictate your health. Because this variant interacts with your diet, it is a subject of interest in the field of precision nutrition. You cannot use this information to diagnose a medical condition or determine your specific nutritional needs on your own. If you are interested in how your genetics might influence your response to dietary fats or if you have concerns about your lipid levels, the best course of action is to consult with a registered dietitian or a healthcare provider. They can help you interpret your overall health profile in the context of your lifestyle and medical history, rather than relying on a single genetic marker.
How common is this variant?
The rs174528 variant is a common polymorphism, with its specific genotype frequencies varying significantly across different ancestral populations due to historical evolutionary pressures related to diet.
Frequently asked questions
Is rs174528 a diagnostic test for health conditions?
No, rs174528 is not a diagnostic test. It is a genetic marker associated with metabolic traits, but it does not predict the development of any specific disease.
Does my genotype mean I need to change my diet?
Genetic variants like rs174528 are only one piece of the puzzle. You should discuss your diet and any concerns about your health with a qualified healthcare professional or dietitian before making significant changes.
Why is this variant associated with fatty acids?
The FADS1 gene produces an enzyme that helps convert dietary fats into long-chain polyunsaturated fatty acids. Variations in this gene can influence how efficiently your body performs this conversion.
Where can I find more information on FADS1?
You can find reliable information on the FADS1 gene through resources like the NCBI Gene database or the MedlinePlus Genetics website, which provide comprehensive summaries of gene functions.
Sources & further reading
Educational information only, last refreshed 9/23/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Regulates fatty acid desaturase expression, altering conversion efficiency of dietary alpha-linolenic acid to EPA and DHA.
Modulates long-chain polyunsaturated fatty acid biosynthesis efficiency and circulating arachidonic acid proportions.
Key regulatory polymorphism governing the efficiency of dietary polyunsaturated fatty acid (PUFA) conversion to arachidonic and eicosapentaenoic acids.
This variant in the FADS1 gene influences how efficiently the body converts plant-based fats into essential Omega-3 and Omega-6 fatty acids.
Influences the efficiency of processing plant-based Omega-3 into EPA/DHA.