The Worst Diets Ever: Diets That Don't Work

Here is an excerpt from a WebMD article. You can find the entire article at:
http://www.webmd.com/diet/features/worst-diets-ever-diets-that-dont-work

The Worst Diets Ever

Experts who spoke to WebMD identified these 5 types of diets that are unlikely to produce long-term results for most people:

1. Diets that focus on only a few foods or food groups(like thecabbage soup diet, grapefruit diet, strict vegan diets, raw food diets, and many low-carb diets). Beware of any diet that rules out entire food groups. People need to eat from a variety of food groups to get all the nutrients they need, says ADA spokeswoman Andrea Giancoli, MPH, RD.

Yale University's David Katz, MD, author of The Flavor Point Diet, says that while restrictive diets do work initially, they fail over the long haul. You can lose weight on diets that focus on single foods (like cabbage soup), but how much cabbage soup can a person eat? Before long, you grow weary of eating the same foods every day, and cravings for favorite foods lead you back to your former eating behavior.

Keep in mind that all foods can fit into a healthy lifestyle in moderation -- even things like bacon, super-premium ice cream, and chips. And when diets forbid certain foods and dieters envision a life without their favorite treats, those diets usually fail. "Any time you restrict a certain food, it triggers cravings for the forbidden fruit and sets up a restriction-binge cycle," says Blatner.

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2. Detox" diets (likeMaster Cleanse, the Hallelujah Diet, and The Martha's Vineyard Diet Detox). Extreme regimens calling for procedures like liver flushes, bodily cleanses, colonics, hormone injections, and more are highly suspect, experts say.

"All the flushes and cleanses are pure nonsense, unnecessary, and there is no scientific basis for these recommendations," says Pamela Peeke, MD, chief medical correspondent for the Discovery Health channel. "Your body is well equipped with organs, such as the liver and kidneys, and the immune system, to rid itself of potential toxins and does an excellent job of cleansing itself without needing flushes or cleanses."

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4.Fasting and very low-calorie diets (like the "Skinny" vegan diet, Hollywood Diet, and Master Cleanse). Fasting has been a cultural and religious tradition for centuries, and is fine for a day or so, but fasting for weight loss is counterproductive, Giancoli explains.

"When you ... consume too few calories, your body thinks it is starving and adjusts the metabolism," she says. "But when you go back to eating normally, your metabolism doesn't readjust and therefore you need fewer calories than before -- otherwise known as the yo-yo syndrome."

What's worse, weight loss during a fast is usually a combination of fat, fluid, and muscle, but the pounds regained will probably be all fat. Not convinced yet? Giancoli says you won't feel good, nor will you have much energy to be physically active while fasting.

And what about very low-calorie diets? Blatner say that diets promising losses of more than a half to 1 pound per week are simply not realistic.

"When you see diet books touting 5, 10 or 15 pounds in a short period of time, it is unrealistic," says Blatner. Depending on how much you have to lose, you may experience some initial water loss. But over time, weight loss averages out to around a pound per week, she says.