Loneliness appears closely tied to poorer mental health, well-being and overall health. Mental health shows the clearest linkAcross the analyses, both loneliness and social isolation were connected with poorer mental health and lower well-being. Taken together, the results support treating loneliness, and potentially social isolation, as public health concerns because of their relationships with mental health, well-being and general health. Loneliness becomes a public health priorityAs loneliness receives greater recognition as a public health challenge, efforts to address it could benefit individuals as well as society more broadly. Supporting people who feel lonely or socially isolated could help improve mental health, well-being and overall health.”