A lot of the fad diets have penetrated the Observant Jewish world, which is infamous for unhealthy eating especially on Shabbat - after services Kiddush of liquor and pastry, followed by a meal of white Challa, potato and noodle kugels and cholent, with a desert of more cakes, roasted nuts and parve ice cream.
Sure, many "victims" of the fad diets have lost tons of weight. But they don't exercise. Their bodies therefore look like big empty burlap sacks draped on bone. At least when they were fat, their muscles had to work to carry the extra weight. But now, nothing. No muscle tone, just empty flab.
Modern society has become so focused on weight loss, that any weight loss seems to be good. It certainly is not. You look better and feel better when you increase your muscle-to-fat ratio. In other words, by exercising and increasing caloric intake - especially with quality protein and good HDL-producing fats - you gain weight big time without adding a millimeter to your waist or hips. In fact, your trousers or skirt fits better than ever.
The impressive initial weight loss of the "effortless" fad diets comes from losing the strategic and vital area of your body - your muscle mass. Therefore, the goal of dieting should be to improve body composition, the percentage or ratio of muscle to body fat, like we said. You do that by losing fat without losing muscle tissue. Maintaining and even increasing muscle mass is critical to weight control, because the more muscle you have, the more calories you burn.
That's what I call "Body Politic". So, forget about your weight and just be strong and healthy. When you eat right and exercise, you'll burn fat and build muscle anyway. G-d willing, I hope to post more body-health and fitness pointers in the near future. Meanwhile, stay healthy!