But no one goes from actually fat to actually thin and stays thin permanently. And when I say "no one," I mean those cases are so obscenely rare that they don't even appear on the chart. They can't even find enough such people to include in the studies. It's like trying to study people who have survived falling out of planes. Being fat is effectively incurable, every study shows it, and no one will admit it.
How rare? Well, this person did the math, and as far as they could tell, two out of 1,000 Weight Watchers customers actually maintain large weight losses permanently. Two out of a thousand. That means if you are fat, you are 25 times more likely to survive getting shot in the head than to stop being fat.
I like to think we're the 0.2%'ers. Anyways here's the article.