I think, and it is confirmed with many of my patients that most popular and widely advertised diets work. Sooner or later the person who is on a diet gets tired and bored and drops it. And then it doesn’t work, because someone is failing to obey the principles and rules, not because the diet itself fails. I believe that it is wise to choose 2 or more diets with different and unrelated principles and rotate them… Most diets would involve guidance regarding food quantity, food quality and regimen of food consumption. Food quality is what makes one diet different from the oners. Food quantity is generally more or less similar and usually targeted to create around 500-750 calories a day. Some diets do not explicitly advice to count calories, instead they generally recommend a portion control by various recommendations which would end in around 1200 calories a day consumption, which would end up in a weight loss for the great majority of participants. Low carb diets appear to be one of the most popular and generally effective and include Atkins diet, South Beach diet, Paleo diet, Dukan’s and very popular lately Keto diet. There are also low fat diets, various diets rotating different ratios of macronutrients.