Emily Leeming makes eating enough fiber a priority. As a dietitian, microbiome researcher , and author of "Fiber Power," she knows just how important the hearty stuff is for our health. It's associated with the gut, but in reality, fiber plays many crucial roles in the body, from lowering cholesterol to keeping glucose levels in check, Leeming told Business Insider. Fiber is found in plant foods like whole grains, beans, lentils, veggies, fruits, nuts, and seeds. Organizations including the