In 2012, up to 35% of US adults and 17% of teens were obese (1).

Many people blame obesity on poor dietary choices and inactivity, but it’s not always that simple.

Other factors can have powerful effects on body weight and obesity, some of which are outside of the person’s control.

These include genetics, environmental factors, certain medical conditions and more.

This article lists 9 compelling reasons why obesity is not just a choice.