Reduce your meat intake

Vegetarians are generally thinner and healthier than meat-eaters, according to a 2013 study published in the American Journal of Nutrition and Dietetics.

While going totally vegetarian may not be realistic for you, one way to slim down your meals is to replace some meat with plant protein. Black beans, for example, give you 15 grams of protein per serving, and mushrooms are rich in umami flavor, and can be used to replace half the ground beef in most recipes.