what is obesity

Obesity is a disease in which excess body fat has accumulated to such an extent that health may be negatively affected. It is commonly defined as a body mass index (weight divided by height squared) of 30 kg/m2 or higher. This distinguishes it from being overweight as defined by a BMI of between 25-29.9.Many studies show an association between excessive body weight and various diseases, particularly cardiovascular diseases, diabetes mellitus type 2, sleep apnea, certain types of cancer, and osteoarthritis. As a result, obesity has been found to reduce life expectancy.