Wonder full Keto ladder. The dieter gets an increase of five grams of carbohydrates per week from a different food group each week during this phase. The next phase increases the carbohydrates until weight loss stops. Once the dieter reaches the final weight goal the maintenance phase kicks begins. The Atkins diet shows immediate weight loss but is difficult to stick to because of rigid eating patterns. A study showed that the diet might cause kidney damage. #2 The green tea diet uses a nutritional low calorie diet and adds green tea to every meal and snack. #3 Number three on the top ten fad diet list is the negative calorie diet. The diet gets its name from the theory that the foods on the diet use more calories to digest than they contain. While there is no scientific proof that you can eat your way thin, many of these foods are healthy, nutritional foods that are low in calories.