Protein, calorie, and satiety data are summary of research performed by Associate Director GPPS at Penn Medicine Jacqueline McLaughlin between June 1, 2008 and December 31, 2008. Averages are based on total eating episodes per day; raw source data from research provided here for each respective diet: Weight Watchers, Jenny Craig, Nutrisystem, Medifast.

Weight Watchers comparison does not include "Cheat Points" which will increase weight gain and calories for Weight Watchers. USDA data sourced for typical Weight Watchers meals.

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