Disease risks of obesity, Michael Berger: The fallacy of ideal body weight standards; Obesity and diabetes - many as yet unanswered questions; Present public health issues on obesity. Are all calories equal? Andrew M. Prentice: Possible mechanisms by which calories from macronutrients might not be equal; Are all calories equal for slimmers?; "Are all calories equal?". Metabolic risk factors for the development of obesity, Arne Astrup, Anne Raben, Annebeth R. Skov, Claudia Sorensen and Soren Toubro: Determinants of energy expenditure; Low metabolic rate as a risk factor; The effect of dietary fat/carbohydrate on energy expenditure; Oxidative autoregulation; Diet composition and obesity. Physiological response to slimming, Susan A. Jebb: Short-term consequences of slimming; Long-term consequences of slimming. Health effects of weight cycling, Lauren Lissner: The metabolic hypothesis; Weight cycling and health; Interpretation of epidemiological findings; Psychological factors. Food preferences and body weight control, France Bellisle: Food preferences and obesity; Fat intake and fat preference in the genesis of obesity; Genetic predisposition. Psychological aspects of obesity, Volker Pudel: Early psychological theories; Emergence of the restrained eater; Restrained eating and obesity; Bulimia nervosa; Strict control and the disturbance of eating behaviour; Counter-regulation; Individual variability; Dietary macronutrient selection and body weight control; Successful and unsuccessful weight control strategies. Realistic expectations of obesity treatment, Stephen Rossner: No new treatment principles; A pessimistic view; Why so little succcess?; Realistic strategies; The definition of success; An optimistic view. Health professional approach to weight control, Xavier Formiguera: Hypocaloric diet; Exercise; Pharmacotherapy; Very low-calorie diets; Surgery.