Best Weight-Loss Diets: The Data

A panel of experts examined the research supporting—or refuting—a diet's potential to bring both short- and long-term weight loss, assigning scores on a scale of 1 (ineffective) to 5 (extremely effective) in these two categories. Those measures contributed equally to a diet's overall weight-loss score. (See Best Diets methodology.)

Rank Diet Overall Weight Loss Short-Term Weight Loss Long-Term Weight Loss
#1
Gold Medal
3.8 4.0 3.5
#2
Gold Medal
3.5 4.1 2.9
#2
Gold Medal
3.5 3.8 3.2
#2
Gold Medal
3.5 3.7 3.3
#5
Gold Medal
3.4 3.6 3.2
#6
Gold Medal
3.3 4.0 2.5
#6
Gold Medal
3.3 3.4 3.3
#6
Gold Medal
3.3 3.4 3.2
#6
Gold Medal
3.3 3.6 2.9
#6
Gold Medal
3.3 3.4 3.3
#11 3.1 3.2 3.0
#11 3.1 3.8 2.5
#11 3.1 3.4 2.9
#11 3.1 3.3 2.9
#15 3.0 3.0 2.9
#15 3.0 3.1 2.8
#15 3.0 3.7 2.3
#15 3.0 3.2 2.8
#19 2.9 2.9 2.9
#20 2.8 3.3 2.4
#20 2.8 3.1 2.5
#20 2.8 2.9 2.7
#23 2.7 3.1 2.3
#23 2.7 3.5 2.0
#23 2.7 3.2 2.3
#26 2.6 3.1 2.1
#26 2.6 2.6 2.6
#26 2.6 3.0 2.3
#29 2.5 3.0 2.0
#29 2.5 2.8 2.2
#31 2.3 2.6 2.0
#32 1.9 2.1 1.7