Genetic research clarifies alcohol addiction risks in children of alcoholics

A major Swedish study involving approximately 160,000 people has found that between 50 and 60 percent of alcohol abuse is linked to inherited traits. Researchers, including Kristina Sundquist from Lund University, noted that having close relatives with alcohol addiction can double or triple an individual's overall risk.

Specific genetic variations, such as those in the GABRA2 gene, can alter how the brain reacts to alcohol, potentially accelerating the development of dependency. However, experts emphasize that genetic inheritance is not a guarantee of addiction.

Researchers from Aarhus University, including Birgitte Thylstrup and Torsten Kolind, highlighted that environmental and social factors play a significant role. Factors such as family divorce, school difficulties, ADHD diagnoses, and a lack of economic resources are all associated with an increased risk of later alcohol dependence. Experts stress that because genetic risk is “far under 100 percent,” individuals are not “doomed” by their family history.