الفهرس 
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Abstract
Since 1997 the WHO formally recognized obesity as a global epidemic. Overweight and obesity are the fifth leading risk for global deaths. At least 2.8 million adults die each year as a result of being overweight or obese. Obesity is a primary medical condition that is progressive, relapsing, and usually lasts many years; It is associated with increased use of health care. Obesity is a chronic condition and a complex disorder that requires long-term follow-up and care. It is characterized by an excess of body fat. It is believed that both over-consumption of calories and reduced physical activity are mainly involved in obesity. It is most often defined by the body mass index, a formula that is highly correlated with body fat. Body mass index is weight in kilograms divided by height in meters squared (kg/m2). person is considered obese if they have a body mass index (BMI) of 30 or greater, the terms also identify ranges of weight that shown the increase in likelihood of certain diseases and other health problems.
Obesity become a major health care priority of the 21st century. Obesity is associated with an increased risk for cardiovascular disease, type 2 diabetes, hypertension, dyslipidemia, obstructive sleep apnea, certain types of cancer, osteoarthritis and asthma . As a result, obesity has been found to reduce human life expectancy.
Obesity hasObesity has an economic impact in addition to its health impacts, obesity leads to many problems including disadvantages in employment, increased lost hours of work and increased business costs. These effects are felt by all levels of society from individuals, to corporations, to
Summary & conclusions
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governments