"The evidence from observational studies is conflicting: some studies have shown weight loss to be associated with increased mortality, but this could be because differentiation was not made between intentional and unintentional weight loss. Mechanistic hypotheses can be raised for both beneficial and harmful effects of weight loss." (Ryan) Therefore, the medical, psychological and social risks of obesity and dieting offer an important point of comparison between the two and there are various views on this question.
Analyzing the risks involved in obesity, it becomes lucid that there are numerous diseases and health risks caused by obesity which include hypertension, coronary heart disease, stroke, type 2 diabetes, cancers, gall bladder disease, glucose intolerance, respiratory diseases, osteoarthritis etc. However, it is important realize these risks in the context of the social and psychological aspects, along with the medical aspects. "Despite the risks related to obesity, it is a mistake to exaggerate those risks.