Popular Fad Diets, Ranked From Best to Worst

Weight Watchers

This diet was made popular by Oprah and won the U.S. News' best diet for weight loss. It works by calculating SmartPoints numbers based on gender, weight, height, and age. Every food item is given a point value based on nutrition; most fruits and vegetables are zero points, which helps to keep a person from the starvation feeling that comes at the start of a new diet. Weight Watchers also have an app and website where people can checkpoint values, and they also offer local meetings for support. There is evidence that users are more likely to lose weight the more they engage with the brand, losing an average of six pounds after four weeks.