You should look like no one but you. Fad diets may cause an initial weight loss, but the problem begins when one attempts to maintain their weight. In most cases when one finishes a fad diet, they will put the weight back on. When this occurs you have begun a process that is very detrimental to your weight loss efforts. You will lose lean muscle mass as you lose weight, but when you regain the weight, you will replace the lost muscle mass with fat thereby decreasing your calorie burning ability even more so.
Muscle burns fat around the clock.
Another reason to avoid fad diets is they can be very restrictive and one can easily become bored with them. To incorporate better eating habits, there are some general rules you can follow to help in your weight loss efforts. The best way to start is slowly. You need to focus on eating in such a way that in time the improved eating habits will allow you the ability to reach a desirable weight that can be maintained indefinitely. It's all about realistic goals that are attainable for you.