Hey, Meghan here! Ever wondered how some people stay so skinny whatever they eat while others pile on the pounds simply by looking at a donut? Turns out, those skinny types really are the lucky ones, and being overweight isn't your fault. Because according to new Ivy League research, those skinny types are blessed with a 'naturally lean' gut microbiome. The good news is, anyone can now become naturally lean – including you. All you need is a lean microbiome!