Background: Obesity is one of the greatest public health challenges worldwide. It is not only a medical but also a philosophical, ecological, economic, sociocultural, and psychological problem as well as a severe consequence of our modern value definition to ‘receive more and more'. Therefore, physicians are not able to treat obesity broadly and should not be used as tools to achieve certain weight goals. Methods: This article presents an outline of conservative obesity therapy. Using the key words ‘obesity', ‘diet', and ‘exercise', a search was conducted in the PubMed and ScienceDirect databases for the period from 1995 to 2015. Results/Conclusion: The goal of obesity therapy is primarily the reduction of abdominal fat distribution. Only after achieving this main objective, weight loss reduction can be included by changes in eating and activity habits as well as further lifestyle modifications supplemented by weight-reducing medical, invasive, and/or surgical therapy measures in order to reduce obesity-associated comorbidities and to improve quality of life. A reduction of fat intake while avoiding unsaturated fatty acids, an optimization especially of the quality of carbohydrate and protein intake, an increase in physical activity (about 30-60 min per day) with individual adaption, and a personal, ongoing therapeutic leadership is necessary to reach the main goal, i.e. losing 5-15% of the initial weight.