Obesity is defined as an excessive amount of body fat. Individuals who are 20 percent over ideal body weight are considered obese.
Morbid obesity is not simply a result of overeating, failing to exercise, or a lack of will power. Research has shown that genetics is a significant underlying cause of obesity. Some people turn more of their calories into energy and heat, while others turn calories into fat. Morbid obesity is hereditary. If you’re morbidly obese, there’s a good chance it runs in your family.
The genetic connection with morbid obesity may explain, in part, why the success rate for non-surgical approaches to treating morbid obesity is so poor. NIH research shows that even those who lose weight gain most of it back within one year.