Update in the management of obesity.

Significant increase of obesity prevalence in almost all countries in the world recently has had obesity as a global health problem, and WHO in 1998 defined it as "the global epidemic". Simply, obesity is defined as an excessive fat accumulation in fat tissue due to imbalance of energy intake and expenditure. Body mass index is a simple method for defining the degree of overweight and obesity, however, waist circumference is the preferred...