The prevalence of obesity is continuously increasing in Germany. Only one third of German adult inhabitants exhibits a desirable body weight. However, there is still a discrepancy between both formerly separated countries of Germany. The prevalence of obesity is higher in the eastern part, the former German Democratic Republic (DDR). Also, the increase in obesity (BMI > 30) in men and women was somewhat higher in the eastern part. The main intention of prevention of overweight is stabilizing or moderately reducing body weight by lowering energy intake and by increasing physical activity. Also therapy of obesity should be based on dietary restriction, enhanced physical activity and behavioural therapy. Therapy with drugs is only recommended if the above mentioned programs were not successful. A surgical therapy is recommended in cases with a BMI of > 40 or of > 35 with significant health implications. The governmental authorities support a lot of activities about healthy eating and physical activity partially together with groups of industry.