Obesity is a chronic and complex disease, and the causes are often unclear. Evidence suggests that there is frequently more than one single cause. Genetic, metabolic, environmental, psychological and social factors can all play a part.
Many people are so overweight that it affects their overall health and life expectancy. Obese people often have diseases (known as co-morbidities), such as type 2 diabetes, high blood pressure, high cholesterol, sleep apnea and arthritis, that affect their quality of life and can be life threatening if not carefully controlled.
Many severely overweight people have tried various methods for losing weight throughout their lives with no lasting success. Your physician will certainly want to hear about your attempts at losing weight, and your insurance company may require documentation of the methods you have tried in the past, but in order to be eligible for weight loss surgery certain criteria must be met.
