Fad diets are considered to be the fastest approach in losing weight. These diets are considered harmful because they often eliminate those important nutrients that are needed for the maintenance of good health. Often, the research on these diets is faulty so they can change body’s chemistry as well. Fad diets have taken over peoples’ minds and are endorsed by celebrities over media as they believe they will get quicker fixes, longer life spans and miraculous cures. One of the desired methods to weight loss is low carbohydrate diet which involves Atkins Diet in which Ketosis stage is induced with higher fats and little carbohydrates. The Ketogenic diet that gives priority to restriction of carbohydrates than to fats. High protein diet involves protein in exceeded amount combined with low carbohydrate intake. Zone diet is a popular fad diet. Low fat diets were discovered for the treatment of heart diseases along with intermittent fasting or calorie restriction methods. Some diets were introduced according to blood group to reduce risk of some diseases but they always lack some of the major nutrients and by not receiving the right amount of nutrients, one can pose greater risk to life and chances of developing serious health problems can increase.