By the Time Austin Reached His Twenty-Fifth Birthday, He Had

Multiple Choice

By the time Austin reached his twenty-fifth birthday, he had a weight problem. Since then, Austin has been on several diets, each time losing some of his excess weight. But as soon as Austin stops dieting, he regains the excess weight in a matter of weeks. The phenomenon that Austin, like so many dieters, is experiencing is called:

A) leptin resistance.
B) dopamine resistance.
C) weight cycling.
D) ghrelin resistance.