You've been cutting carbs, lifting weights, and aerobicizing till you're wet in the face. You've actually dropped two sizes. You feel fabulous. You look fit. Now if only you could lose those last five pounds. Sound familiar? Welcome to the infamous Diet Plateau. After making a mountainous effort to exercise and eat right, you find your weight loss results have hit level ground. But you're not alone up there. Diet plateaus are very real, usually occurring four weeks to two months into a diet, says Roxanne Moore, R.D., the coordinator of Nutrition Education at Townson University…