In the category of “news you can use,” Emily Oster summarizes a new study that compares weight loss on various diets. After cutting through all the muck, 
we get the chart on the right. The answer, it turns out, is that all of the diets are about equally effective.
So which one you choose is mostly a matter of preference. If you think you can stick to a low-carb diet, choose one of those. If you like vegetables, choose a veggie-based plan. If you think you can tolerate low fat, go for one of those. What matters isn’t so much the mechanics of the diet, but whether you can stick with it over the long haul.
(If your doctor recommends a particular diet because you suffer from some particular condition, then of course this changes things. And remember, “don’t be an idiot” is always an unvoiced component of all diet and health recommendations.)
As for me, I’m on the three-quarters diet. I do this about once a decade or so and then spend the succeeding decade gaining back the weight I lost. This is my third go-around. As you might guess, it’s a pretty simple diet: eat less food. In particular, I try to eat about three quarters of my usual meals and snacks. I’m finding it much more annoying this time than in the past—partly because I’m working at home, where temptation is ever present, and partly because my motivation and self-discipline have deteriorated over the years. However, the precipitous collapse of my body over the past six months is providing at least some short-term motivation, and yesterday I learned that my sleep apnea is apparently much worse than it was a decade ago. Maybe weight loss will help with that. I hope so, since I had no luck with a CPAP machine back then, and I kind of doubt I’ll have better luck this time around. But we’ll see.
