A recent study conducted by researchers at Virginia Commonwealth University and Rutgers University, published on May 5, 2025, sheds light on how romantic partners can impact an individual's genetic predisposition to unhealthy alcohol consumption [1, 4]. The research indicates that a partner's habits, personality traits, and mental well-being can either amplify or diminish the influence of genetic risk factors for binge drinking [1]. These findings may lead to revised strategies in couples therapy and alcohol intervention programs [1, 4].
The study, which analyzed data from Finnish twins in long-term relationships, revealed that frequent drinking or smoking by one partner increased the likelihood of alcohol consumption and binge drinking in the other [1, 4]. Furthermore, the genetic risk for binge drinking had a more pronounced effect when partners exhibited traits such as smoking, lower conscientiousness, or higher psychological distress [1].
These insights underscore the intricate ways in which romantic partners can shape each other's health behaviors [1, 4]. The study suggests that interventions targeting couples should consider these dynamics to promote healthier outcomes and support abstinence [1, 2, 3]. Behavioral Couples Therapy (BCT) is designed to improve relationships while building support for abstinence [2, 3, 6]. This involves increasing positive activities and improving communication between partners [2, 3].