SnackWell effect
The SnackWell effect is a phenomenon whereby dieters will eat more low-calorie cookies, such as SnackWell's, than they otherwise would for normal cookies. Also known as moral license, it is also described as a term for the way people go overboard once they are given a free pass or the tendency of people to overconsume when eating more of low-fat food due to the belief that it is not fattening.