Major New Study: Low-Carb > Low-Fat Diet

By the end of the yearlong trial, people in the low-carbohydrate group had lost about eight pounds more on average than those in the low-fat group. They had significantly greater reductions in body fat than the low-fat group, and improvements in lean muscle mass — even though neither group changed their levels of physical activity.

While the low-fat group did lose weight, they appeared to lose more muscle than fat. They actually lost lean muscle mass, which is a bad thing,’ Dr. Mozaffarian said. ‘Your balance of lean mass versus fat mass is much more important than weight. And that’s a very important finding that shows why the low-carb, high-fat group did so metabolically well.’ …

In the end, people in the low-carbohydrate group saw markers of inflammation and triglycerides — a type of fat that circulates in the blood — plunge. Their HDL, the so-called good cholesterol, rose more sharply than it did for people in the low-fat group. Blood pressure, total cholesterol and LDL, the so-called bad cholesterol, stayed about the same for people in each group.

Source: NY Times, Study abstract

From my own experience, portion control has been responsible for my weight loss.  Exercise accelerated/helped, but it took some time to realize I was “eating it all back” because I would justify the intake because I’d “just work it off”.  Now that I’m approaching my goal, I’m focusing on eating healthier and don’t mind eating more because the calorie deficit has to end or I risk self-cannibalization (eating muscle for energy).