Is Asthma Genetic?
Asthma is a chronic respiratory condition where the airways become inflamed and narrow, making breathing difficult. Genetic variants affect airway inflammation, immune response, and bronchodilation.
Affects ~1 in 12 people.
Genetic Factors Behind Asthma
Research has identified multiple genetic variants that influence a person's susceptibility to Asthma. While no single gene determines whether someone will develop this condition, specific variants can increase or decrease risk. Key genes studied in relation to Asthma include:
ORMDL3IL33TSLPADRB2ORMDL3ORMDL3 has been associated with asthma in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
IL33IL33 has been associated with asthma in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
TSLPTSLP has been associated with asthma in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
ADRB2ADRB2 encodes the β2-adrenergic receptor; variants affect receptor down-regulation and bronchodilator response.
How GenomeInsight Analyzes Your Risk
GenomeInsight examines your raw DNA data from services like 23andMe, AncestryDNA, or whole-genome sequencing (VCF files) to identify genetic variants associated with Asthma. The analysis is performed entirely in your browser, meaning your genetic data never leaves your device.
For each relevant variant, GenomeInsight reports your genotype, the associated risk allele, the odds ratio from published research, and your overall risk profile compared to the general population. Results are presented with easy-to-understand risk visualizations and percentile rankings.
Genetic risk is only one piece of the puzzle. Lifestyle, diet, environment, and family history all contribute to overall risk. GenomeInsight's analysis is for informational and educational purposes and is not a medical diagnosis.
Understanding Your Asthma Results
After uploading your DNA file, you will receive a detailed health risk report covering 52 conditions, including Asthma. For each condition, GenomeInsight analyzes multiple SNPs (single nucleotide polymorphisms) and calculates a combined risk assessment.
Your results will show whether you carry risk-increasing or protective alleles in genes like ORMDL3, IL33, TSLP, and ADRB2. Risk levels range from "Below Average" to "Significantly Increased," with population percentile comparisons to contextualize your results.
Frequently Asked Questions About Asthma
Which genes are linked to Asthma?
The variants most consistently associated with Asthma lie in or near ORMDL3, IL33, TSLP, ADRB2. Each variant shifts risk modestly on its own; the report combines all of them into an overall genetic risk estimate compared with the reference population.
If I carry risk variants, will I develop Asthma?
Not necessarily. A genetic predisposition means your probability is higher than average — it is not a diagnosis. Lifestyle, environment, age and chance all contribute, and most people with elevated genetic risk never develop the condition. Conversely, low genetic risk is not a guarantee of protection.
What DNA data do I need for this analysis?
A raw-data file from 23andMe, AncestryDNA, MyHeritage or a whole-genome VCF covers the markers used in this analysis. Upload takes place entirely in your browser — your file is never transmitted to or stored on any server.
Sources & Further Reading
The risk associations described on this page come from published genome-wide association studies and curated public genomic databases. Explore the primary sources for each gene:
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Discover Your Asthma Risk Profile
Upload your 23andMe, AncestryDNA, or VCF file for a free, privacy-first genetic analysis covering Asthma and 51 other health conditions.
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