Analyzed associations between 2,987 adults' social networks and lifestyles in terms of leisure activity, smoking, and the intake of vegetables. Compared with socially integrated men, those with few social contacts or little social support were more often inactive during leisure time and did not eat vegetables every day. Women with few contacts and friends and relatives were more often physically inactive or smokers. Results suggest that family and friends, by their mere presence in the individual's social environment, and the person's own feelings about being alone may have an impact on his or her health related behaviors. (PsycINFO Database Record (c) 2012 APA, all rights reserved)