Gambling is a popular but risky activity that can lead to problem gambling in some players. The authors evaluated evidence in previous systematic reviews on the effectiveness of different prevention and harm reduction interventions. Ten reviews reporting on 55 studies were identified. Many studies were interventions to change individual behaviour. Less research focused on interventions at a population level, such as reducing the supply of gambling opportunities. There is a lack of research on how interventions affect sociodemographic groups differently.
