Explanations for Addiction

There is no single cause of addiction — it is influenced by a combination of biological, psychological, and social factors. Understanding these different explanations is important for developing effective prevention and treatment strategies.

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1. Genetics

Research suggests that genetic factors play a role in vulnerability to addiction:

Evidence

• Twin studies — identical twins (who share 100% of their DNA) are more likely to both develop addiction than non-identical twins (who share 50%). This suggests a genetic component
• Family studies — addiction tends to run in families. Children of parents with addiction problems are at higher risk
• Specific genes — researchers have identified genes that may influence addiction vulnerability, including genes that affect dopamine receptors (the DRD2 gene)

Evaluation