Shift work is a necessary part of a nurses’ work schedule to patients who need 24 hours of continuous care. Eating habits of nurses are influenced by working long hours, not having adequate time to take a meal break, and not having access to healthy food choices which can cause stress and exhaustion and results in weight gain and obesity. The purpose of this quantitative logistic regression analysis, guided by the health belief model and the theory of planned behavior, was to determine if there was a relationship between shift work and the unhealthy eating habits/obesity rates of acute care nurses. Data were gathered from the Nurses’ Study 3, which includes information from nurses or nursing students from the United States and Canada. The sample was 8988 nurses who worked 12-hour shifts and more than 20 hours per week. The results demonstrated that the relationship between working 12-hour shifts and unhealthy eating was not statistically significant (p = 0.39) the relationship between working 12-hour shifts and obesity rates were not statistically significant (p = 0.32). Further studies are needed to determine how often nurses eat or eat while working during their shift because of perceived inability to take scheduled breaks because of workloads. The study findings provide evidence for health professionals to examine their eating habits and modify healthy eating behaviors to maintain a healthy lifestyle. When nurses learn to care for themselves, nurses are positive role models for their patients by encouraging healthy lifestyles which effects positive social change