This document discusses the harms of adolescent alcohol use and the influence of parents. It notes that alcohol is the world's number one risk factor for poor health among those aged 25-59. Early and regular teen drinking is linked to increased risks of alcohol and drug problems, accidents, and mental health issues. While parents often underestimate their influence on teen drinking and view it as inevitable, parental drinking, provision of alcohol to children, and lack of rules/monitoring are associated with higher teen drinking risks. The document calls for addressing Ireland's culture of unhealthy drinking and empowering parents to reduce risks to adolescents.