How your friends make you fat—the social network of weight

One of the big health news stories of 2007 was a study showing that your friends influence your weight. A new study from Arizona State University suggests that this happens because people consciously and subconsciously change their habits to mirror those of their friends. Here’s an example: You’re at a restaurant with friends and the waiter brings over the dessert menu. Everyone else decides not to order anything, so you pass, too, even though you were dying for a piece of chocolate mousse cake. The study provides another motivation for making healthy diet choices—in addition to helping your weight, it could help your friends and family members weights, too.