A new study by Boston's Brigham and Women's Hospital reveals that eating a   late lunch may make you fat. Researcher Frank Scheer says, ''Those who ate before   3pm lost 30% more weight than those who dined later. Our results indicate that   late eaters displayed a slower weight-loss rate and lost significantly less   weight than early eaters, suggesting that the timing of large meals could be   an important factor in a weight loss program. The team divided the participants   into two groups: early eaters and late eaters. During this meal, 40% of the   total daily calories were consumed. Early eaters ate lunch any time before 3pm   and late eaters, after 3pm. Late eaters lost significantly less weight than   early eaters, and displayed a much slower rate of weight loss.''