More evidence to support the anti-diet position is put forth in this article by Harriet Brown, the author of Body of Truth.

This isn’t breaking news; doctors know the holy trinity of obesity treatments—diet, exercise, and medication—don’t work. They know yo-yo dieting is linked to heart disease, insulin resistance, higher blood pressure, inflammation, and, ironically, long-term weight gain. Still, they push the same ineffective treatments, insisting they’ll make you not just thinner but healthier. do not work: The thin evidence that losing weight makes you healthier.