There has been a dramatic rise from 46% to 59% in the percentage of households with only 1-2 people from 1970 to 2000. A 40% increase in the number of people living alone is projected for 2010. Social isolation is consistently one of the strongest predictors mortality in older adults. Recent research is demonstrating that stress plays an important role linking social isolation with poor health. Socially isolated older adults are more likely to feel chronically stressed and overwhelmed with everyday life demands. Furthermore, isolated adults respond to stress differently, both psychologically and physiologically. Socially isolated and lonely older adults show long-term elevations in "inflammatory cytokines", which are signaling molecules related by immune cells. These Inflammatory cytokines play a role in a number of age-related diseases including cardiovascular disease, type-2 diabetes and arthritis. Novel, readily useable interventions aimed at decreasing isolation and "re-calibrating" stress responses might be helpful to older adults.