There’s this funny paradox is that nearly every diet works and nearly no diet works at the same time. A diet may be effective in the short term because you’re cutting your calories. So you can do that with cabbage soup, molasses, chicken tenders. If you cut your calories back, you’re going to lose weight. But the diets can be very unsafe. And they also tend to not work in the long term, because people can’t stay on them very well.
— Psychologist Kelly Brownell on dieting.