While it is generally accepted that eating healthily and exercising is the only truly reliable way to avoid weight gain, the truth is that for many people this seems like a hell of grind. It takes a lot of effort, and it can be a while before you see substantial results from it – so it becomes more attractive to take a short cut!
The most troubling "alternative" to healthy food is eating disorders. Anorexia is most often preferred for people who believe like balanced food often requires too much calories. Although associated primarily with teenage girls and young women, anorexia is not limited to that section of society.