When classified by diet, a recent study found that people who are omnivores, who follow the Standard American Diet, are the heaviest, with an average body mass index of 28.8.
Flexitarians, who eat meat infrequently, weigh less, but are still overweight.
Vegetarians, who do not eat meat, but may eat dairy or eggs, weigh even less, but even they are on average within the category of being overweight.
Vegans, who do not eat any animal products, are the only one of these four groups who are on average a NORMAL weight!
Watch a video discussing the findings from this study from the Journal of the American Diabetes Association here:
And while you're there, explore Dr. Michael Greger's web site, http://www.nutritionfacts.org/. There's some great information there, and Dr. Greger delivers the facts with his unique sense of humor.