| our eating behaviours. For example, internalization of the thin body ideal has been found in prospective studies to increase social appearance comparison and body dissatisfaction already in young ages (Rodgers et al., 2015). In turn, body dissatisfaction predicts dietary restraint (Dunkley et al., 2001), disordered eating behaviours, and psychological distress (Johnson & Wardle, 2005).Concern about weight is widespread in today's societies. In a large and representative community sample of Dutch consumers 63% of both males and females were identified as dieters and dieting reflected mainly a heightened concern about weight rather than an actual restriction of food intake (de Ridder et al., 2014). Weight control behaviours are also very widespread. For instance, more than 70% of consumers were found to exhibit behaviours such as eating low-calorie food, limiting sweets and snacks, or eating smaller portions in a crosssectional study with Dutch adults (20-40 years old) (Wammes et al., 2007) and similar findings have been observed also in other populations (French et al., 1999). It is difficult to imagine that such behaviours are driven only by appearance concerns. Many individuals try to regulate their eating driven mainly by health, ideological, or other personal motives (Lindeman & Stark, 1999).Yet for others dissatisfaction with body size and shape is more influential and different motives are often intertwined (Lindeman & Stark, 1999;Pelletier et al., 2004). Furthermore, the obsession about weight and thinness translates into stigmatization of overweight and obese individuals and weight stigma discourages health behaviour change (Brownell et al., 2005). According to the cyclic obesity and weight-based stigma model, weight stigma induces stress, which in turn elicits a series of behavioural, physiological, and emotional responses (e.g., comfort eating, increased cortisol levels, feelings of shame), which associate with weight gain and difficulty in weight loss (Tomiyama, 2014). This is supported by evidence showing that weight stigma associates with exercise avoidance (Vartanian & Shaprow, 2008) and behavioural tendencies that increase food intake such as binge eating (Haines, 2006).Unfortunately, bias towards increased weight is a widespread phenomenon and has even been documented among health professionals who treat obesity and eating disorders (Puhl et al., 2014;Schwartz et al., 2003).In general, therefore, it seems that the societal pressure for thinness creates a general anxiety around eating and weight (in some individuals more than others) that may impede adherence to healthy eating and healthy lifestyles.Chapter 1 | alternative paradigm addressing the gaps and failures of the traditional paradigm of weight management (Gast & Hawks, 1998;Robison, 1997). This new paradigm was based on the assumptions that low weight is not tautological to health, that the cultural pressures for thinness exacerbate the normal differences in size and shape among individuals, that dieting systematically leads to weight gain...