They almost always are. Free diets are just a way to attract unsuspecting people and you probably won't lose any weight with the help of these. There are so many of these weight loss diets out there and one is never sure which one is good. So you should ask among your friends and identify few options before you go in for a weight loss program. In fact some of these diet programs are so bad that they actually make you gain weight instead of losing weight. One of my friends foolishly opted for a high carb diet and she ended up gaining more than three kilos.