How Genetics Shapes Risk for Substance Use Disorder with Dr. Danielle DickHow Genetics Shapes Risk for Substance Use Disorder with Dr. Danielle Dick
Heart of the Matter
Geneticist Dr. Danielle Dick talks with Elizabeth Vargas about how DNA shapes temperament, mental health and risk for substance use disorder. They discuss three genetic pathways to addiction risk, how parents can respond to different child types, and how this knowledge can guide both prevention and recovery.
37:25•15 Sept 2026
How Your Genes Shape Addiction Risk Without Deciding Your Future
Episode Overview
- Genetics strongly influences how brains are wired for reward, impulsivity, anxiety and mood, but "genetics is not destiny."
- Three main pathways to substance use disorder are identified: externalising traits, internalising traits, and individual body responses to specific drugs.
- The "mental health jar" model shows how genetic risk (marbles) and environmental stressors together contribute to whether problems develop.
- Recognising a child’s temperament early allows parents to teach coping skills and channel risk-taking into healthy outlets, reducing later substance risk.
- Understanding which pathway led to substance use can help shape more effective, sustainable recovery plans for young people and adults already struggling.
“"dna doesn't just code for brown or blue eyes. It influences the way we move in the world."”
Curious about how others manage their sobriety journey? This conversation between journalist Elizabeth Vargas and geneticist Dr. Danielle Dick goes straight into how our DNA shapes risk for substance use disorder – without doom, blame or jargon. Across the episode, Dr. Dick explains three main genetically influenced pathways: kids who are more impulsive and thrill-seeking ("externalising"), kids who are more anxious or low in mood ("internalising"), and the way a person’s body responds to specific substances.
She stresses that, while DNA affects how our brains are wired, "dna doesn't just code for brown or blue eyes. It influences the way we move in the world" – but it doesn’t seal anyone’s fate. Parents listening will probably find themselves doing what Vargas did: mentally sorting their children (and themselves) into these patterns.
You’ll hear practical examples of the "high-risk" child who can’t sit still, the anxious child who dreads preschool drop-off, and the teenager who might later reach for alcohol either for the buzz or for relief from overwhelming feelings. Dr. Dick uses a vivid "mental health jar" metaphor to explain how genetics and environment stack together.
Some kids start life with more "marbles" of genetic risk in the jar, but life experiences like trauma, peer substance use, and stress also add to the load. No one, she points out, is born with a full jar or a substance use disorder.
The episode is especially helpful for parents, carers and anyone in recovery who wonders, "Why am I like this?" or "What does this mean for my child?" You’ll hear why early support for anxiety, impulsivity and temperament can lower later substance risk, and how understanding a person’s wiring can shape recovery plans for those already struggling. It’s science-heavy, but with plenty of real-life parenting stories and a gentle reminder: genetics is information, not a verdict.
Could learning more about your own wiring or your child’s be the missing puzzle piece in how you approach recovery and prevention?
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