I blog frequently about obesity. I think the most important thing we can do, as a nation, to combat obesity is to try to prevent our next generation of children from becoming obese. Once people become obese, almost no diet in the world will consistently help them lose weight and maintain that weight loss.
But there is one intervention, a drastic one that has been shown to help obese people. Bariatric surgery! And here’s some data, from JAMA Surgery, on what that treatment does: