The obesity problem is unhealthy excess weight. It is the most common medical problem in the western world.

Obesity causes illness and early death due to

Back and joint problems are exacerbrated by obesity. Peoples' social lives are restricted which subsequently impacts on the lives of their family and friends

What about diet and exercise?

These are important, but for severely obese people, it is not enough. If you are severely obese, the chances of losing enough weight with diet and exercise are very low. Severely obese people need something more.