Obesity has nearly tripled since 1975 more than 1.9 billion adults, 18 years and older, were overweight. Of over 650 million were obese.39% of adults aged 18 years and over were overweight in 2016, and 13% were obese population lives in countries where overweight and obesity kill more people than underweight.39 million children under the age of 5 were overweight or obese in 2020. 340 million children and adolescents aged 5-19 were overweight or obese in 2016 preventable obesity and overweight are defined as abnormal or excessive fat accumulation that may impair the health index (BMI) is a simple index of weight-for-height that is commonly used to classify overweight and obesity in adults. It is defined as a person's weight in kilograms divided by the square of his height in meters (kg/m2). WHO defines overweight and obesity as follows: overweight is a BMI greater than or equal to 25a BMI greater than or equal to 30.BMI provides the most useful as it is the same for both sides and for all ages of adults. However, it should be considered a rough guide because it may not correspond to the same degree of fatness in different individuals needs to be considered when defining overweight and obesity 5 years of children under 5 years of age: overweight is weight-for-height greater than 2 standard deviations above the WHO Child Growth Standards median weight-for-height greater than 3 standard deviations above the WHO Child Growth Standards median. Charts and tables: WHO child growth standards for children aged under 5aged between 5–19and obesity are defined as follows for children aged between 5–19 years: overweight is BMI-for-age greater than 1 standard deviation above the WHO Growth Reference median is greater than 2 standard deviations above the WHO Growth Reference median WHO growth reference for children aged between 5–19about overweight and recent WHO global estimates follow. 2016, more than 1.9 billion adults aged 18 years and older were overweight. 650 million adults were obese. 2016, 39% of adults aged 18 years and over (39% of men and 40% of women) were overweight., about 13% of the world’s adult population (11% of men and 15% of women) were obese in 2016 obesity nearly tripled between 1975 and 2016. 2019, an estimated 38.2 million children under the age of 5 years were overweight or obese. Once considered a high-income country problem, overweight and obesity are now on the rise in low- and middle-income countries, particularly in urban settings. In Africa, the number of overweight children under 5 has increased by nearly 24% percent since 2000. Almost half of the children under 5 who were overweight or obese in 2019 lived in Asia. Over 340 million children and adolescents aged 5-19 were overweight or obese in 2016 overweight and obesity among children and adolescents aged 5-19 has risen from just 4% in 1975 to just over 18% in 2016. The rise has occurred similarly among both boys and girls: in 2016 18% of girls and 19% of boys were overweight. 1% of children and adolescents aged 5-19 were obese in 1975, and more than 124 million children and adolescents (6% of girls and 8% of boys) were obese in 2016 obesity is linked to more deaths worldwide than underweight more people who are obese than underweight – this occurs in every region except parts of sub-Saharan Africa and Asia.