We do it all the time. It doesn't seem to matter whether it's the F-Plan diet, the Pineapple diet, liquid diets or the Drinking Man's diet, people will try almost anything in their frantic desire to shed a few pounds. Unfortunately, the results are usually the same. Although diets do produce results in the short term, very few dieters maintain their weight loss, no matter which diet they try. Even worse than this, most dieters end up bigger than they were before they started dieting.
Diets are hard to do.
Most diets involve a significant change in a person's normal eating habits over an extended period of time. And changing something that is second nature to us very often results in stress - especially if that change is at odds with the habits of those in our social and family world. Dieting is also hard because it relies on our willpower to keep us on the right track. Willpower is hard to maintain for extended periods of time, especially if our dietary rules are too strict. So dieting is hard because people haven't learned the difference between willpower and commitment to long-term behaviour change.