Jenny Craig is the the top diet, according to new ratings released by Consumer Reports Health.
Slim Fast 3-2-1 and Weight Watchers came in second and third.
The ratings are based on the overall effect on weight loss, adherence, and how well they followed the 2010 U.S. dietary guidelines for Americans.
Jenny Craig combines weekly counseling sessions with a portion-controlled regimen of pre-made foods and homemade side dishes.
A study cited in the report found that 92 percent of people on the Jenny Craig program stuck with it for two years, and they weighed about 8 percent less after two years on the program.
People lost weight on all of the diets that were evaluated. “None of these diets are bad for you,” she says.