Obesity is disorder in a foremost nutritional health it’s developed with countries developing. Also is known as increasingin fat accumulation that lead toproblem in health, besidesmay coin one of the reasons lead toloss of life,the obesity not effect on adults just but effect onoffspringand juveniles. In some ofinhabitants the incidence of obesity is superior in female than in male; on the other hand, the variation degree of the between the genderdifferby country.Obesity is generally measured by body mass index and waist circumference, Obesity are classified according to body mass index into:Pre obesity sort 1 : (25 - 29.9) kg/m2, Obesity sort 2 : (30 - 34.9 kg/m2) and extreme obesity sort 3: (40 kg/m2) or greater. Obesity is described by a pathologic condition with augmented overall of cholesterol, triglycerides, LDL cholesterol while reduced of HDL levels.There are many hormones causes pathophysiology of fatness such as adipokines, gutcorrelated hormones and ghrelin, numerous studies have revealed that the association among fatness and the metabolic sickness such as Insulin resistance, activity of lipoprotein lipase in muscle reduction and free fatty acids increasing. Conclusion: Obesity and overweight different between men am women according to quality of life in different population and countries.