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Is Substance Use Disorder Genetic?
- Heritability
- ~50%
- Inheritance
- multifactorial
- Key genes
- ADH1B,ALDH2,DRD2,GABRA2
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Substance use disorders including alcohol dependence have heritability of 50–60%. Genes influencing reward pathways and substance metabolism play key roles.
How Genetic Is Substance Use Disorder?
Genetics plays a meaningful role in Substance Use Disorder, with heritability estimated at around 50%. However, environmental factors — including diet, lifestyle, and exposure — also significantly influence risk.
Key genes associated with Substance Use Disorder: ADH1B,ALDH2,DRD2,GABRA2. Variants in these genes have been identified through genome-wide association studies (GWAS) and clinical research as influencing susceptibility or severity.
Source: CDC Genomics
Does Family History Matter for Substance Use Disorder?
Family history does matter. Having close relatives with Substance Use Disorder can increase your personal risk, though it is not deterministic. Maintaining a healthy lifestyle and regular screening remain important regardless of family background.
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