Is loneliness really a killer?

The evidence is unclear, but what's certain is that it's bad for quality of life
lonely

The evidence is unequivocal, says a US professor of psychology, that loneliness and social isolation predict an increased risk of premature mortality.

Dr Julianne Holt-Lunstad and colleagues note that “advancing social connection” should be a public health priority given the links of loneliness to cardiovascular disease, Alzheimer’s disease, stroke and insomnia.