WeightWatchers

Weight Watchers (WW) have been around since the 1960s. It is a flexible scoring diet that calculates points for each type of meal and controls calories. The score is based on the calorie content of the food, so the more calories, the higher the score. The latest release allocates a score budget based on your dietary and activity preferences (foods are scored based on calories, saturated fat, sugar, and protein) - eat anything you want in that range. Alternatively, you can also eat ZeroPoint foods (most fruits and vegetables and lean proteins like fish, beans, tofu, eggs, and chicken breasts fall into this category). The amount of energy loaded on your body should not exceed the permissible limit.

WW has both been shown to promote short-term weight loss in research studies. A 2013 study found that dieters assigned to WW were eight times more likely to lose 10 percent of their body weight in six months than those who tried to diet on their own. In addition, a review of 39 weight control studies from the Weight Watchers diet found that people who directly participated in the diet lost up to 2.6% more weight than those who did not or follow other diets.