Medically speaking, being overweight means having a body-mass-index (BMI) of 25-30. Obesity is defined by a BMI of 30-40. From a BMI of 40 and upwards, doctors speak of pathological obesity.
The BMI is a measurement for the relation of body weight and body height. It is merely a guideline, and should be calculated by a specialist, who will include other factors besides weight and height.
Also, the “optimal” weight is very much a societal standard.
Many of us may have tried one or the other diet. Some of us lost weight but regained it shortly after. Quite often, people gain even more weight after diets.
There are several different factors that contribute to overweight and obesity.
In most cases, the body burns less of the calories that it is given.
However, because of the many other possible causes (hormonal imbalances, medication, genetic disposition, etc.), we recommend seeking professional guidance to help you with your weight loss.