A healthy or unhealthy lifestyle will most likely be transmitted across generations. According to the study done by Case et al. (2002), when a 0-3 year old child has a mother who practices a healthy lifestyle, this child will be 27% more likely to become healthy and adopt the same lifestyle. For instance, high income parents are more likely to eat organic food, have time to exercise, and provide the best living condition to their children. On the other hand, low income parents are more likely to participate in unhealthy activities such as smoking to help them release poverty-related stress and depression. Parents are the first teacher for every child. Everything that parents do will be very likely transferred to their children through the learning process.
Adults may be drawn together by mutual interest that results in a lifestyle. For example, William Dufty described how pursuing a sugar-free diet led to such associations:
I have come to know hundreds of young people who have found that illness or bingeing on drugs and sugar became the doorway to health. Once they reestablished their own health, we had in common our interest in food. If one can use that overworked word lifestyle, we shared a sugarfree lifestyle. I kept in touch with many of them in campuses and communes, through their travels here and abroad and everywhere. One day you meet them in Boston. The next week you run into them in Southern California.