Is Depression Genetic?
Major depressive disorder is a common mental health condition characterized by persistent sadness, loss of interest, and difficulty functioning. Both genetic and environmental factors contribute to risk.
Affects ~1 in 6 people in their lifetime.
Genetic Factors Behind Depression
Research has identified multiple genetic variants that influence a person's susceptibility to Depression. While no single gene determines whether someone will develop this condition, specific variants can increase or decrease risk. Key genes studied in relation to Depression include:
SLC6A4BDNFHTR2AFKBP5SLC6A4SLC6A4 (the serotonin transporter) carries the 5-HTTLPR length variant, long studied for stress sensitivity — though replication of behavioural effects is mixed.
BDNFBDNF Val66Met affects activity-dependent release of brain-derived neurotrophic factor and has been linked to memory and the brain's response to exercise.
HTR2AHTR2A encodes a serotonin receptor implicated in mood regulation and antidepressant response.
FKBP5FKBP5 has been associated with depression in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
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 Depression. 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 Depression Results
After uploading your DNA file, you will receive a detailed health risk report covering 52 conditions, including Depression. 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 SLC6A4, BDNF, HTR2A, and FKBP5. Risk levels range from "Below Average" to "Significantly Increased," with population percentile comparisons to contextualize your results.
Frequently Asked Questions About Depression
Which genes are linked to Depression?
The variants most consistently associated with Depression lie in or near SLC6A4, BDNF, HTR2A, FKBP5. 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 Depression?
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.
Related Conditions That Share These Genes
Variants in the same genes often influence more than one condition. These conditions overlap genetically with Depression:
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:
Discover Your Depression Risk Profile
Upload your 23andMe, AncestryDNA, or VCF file for a free, privacy-first genetic analysis covering Depression and 51 other health conditions.
Upload Your DNA Data