I thought Tara Parker-Pope's piece on obesity was fascinating, and worked best as a corrective to the notion that weight-loss can be easy and fast. (Lose 30 pounds in 30 days.) But I thought her basic conclusion--that weight loss is essentially impossible for majority of humans--was underserved by her reliance on studies that looked a lot like crash diets. 550 calories a day, much of it coming from shakes sounds insane, as does 30 pounds over eight weeks. It isn't shocking that someone on that diet would gain it all back, and then some. In another case the subjects were on a liquid diet of 800 calories a day.
One question many researchers think about is whether losing weight more slowly would make it more sustainable than the fast weight loss often used in scientific studies. Leibel says the pace of weight loss is unlikely to make a difference, because the body's warning system is based solely on how much fat a person loses, not how quickly he or she loses it. Even so, Proietto is now conducting a study using a slower weight-loss method and following dieters for three years instead of one.