Studies of health providers suggest that satisfaction with life is related to a health professional’s values and sense of purpose which is best achieved when their professional role and private behaviors are in harmony with their personal philosophy. This study sought to describe the philosophy, lifestyle behaviors, and professional practices of dietitians, and evaluate their relationship with life satisfaction. The study recruited a randomly selected group of 520 Registered Dietitian Nutritionists to take a survey containing measures for health conception, integrative care orientation, healthy lifestyles, and satisfaction with life (SWL).