"While various research shows that vegetarians and vegans, on average, consume fewer calories and less fat than omnivores (a 2009 Oxford study found that vegetarians weigh 3 to 20 percent less than their meat-eating counterparts, and a National Cancer Institute study found that subjects who consumed four ounces or more of red meat weekly were 30 percent more likely to die of any cause than those who ate less), these numbers may be misleading," says Rania Batayneh, MPH, a certified nutritionist and owner of Essential Nutrition for You.
Going vegan solely for weight loss can backfire, big time. If you aren’t vigilant with a vegan diet, it’s easy to lack in vital nutrients, vitamins, and proteins, which give you energy and help keep your metabolism stoked. Many first-time vegans may also find themselves reaching for more processed foods like vegan cookies, chips, or even ‘ice cream’ more often with such a restricted diet, and many end up packing on the pounds instead.
If you do decide to adopt a vegan diet, be sure to keep the ‘treats’ to a minimum and plan balanced meals (we love ‘Domestic Vegan’ Diva Jessica Olson’s tips for "going veg"). "Aim to get about 10 to 20 percent of your calories from protein (or about 1 gram per kilogram of body weight), replacing animal protein with healthy plant proteins, like those found in beans, legumes, eggs, nuts, seeds, low-fat dairy, and soy products," Batayneh says. "And, whether you are vegan or not, eating more green, leafy vegetables is great for your health and your waistline."