While many people are interested/obsessed with what they eat, the data that's come out of animal studies, at least, is it's far more important when you eat than what you. There was a fantastic study a few years ago by my friend... He had 10,000 mice on different diets hoping to find the perfect mix of carbs, protein, and fat. And it turns out that the only ones that lived longer were the ones that only ate once a day.