 This review assesses the effectiveness of interventions designed to alleviate social isolation and loneliness in older people. 32 studies were included, with evidence suggesting that group-based and participatory interventions were more effective than non-participatory ones. Interventions that provided activities or support also resulted in improved participant outcomes. The review highlights the need for more well-conducted studies to improve the evidence base. But suggests that common characteristics of effective interventions include those developed within a theoretical basis and those offering social activity and or support within a group format. This article was authored by Greaves Collin J., Richard Susan H., Dickens Andy P., and others. We are article.tv, links in the description below.