Slide 2 of 9: Fruit, vegetables, and beans are known to have high fiber content, and avocados are no exception.``One serving of a medium avocado is low in carbohydrates, yet it contains three grams of fiber,'' <PERSON> says. ``Consuming higher fiber may reduce the risk of heart disease, type 2 diabetes, and obesity.''<PERSON> to learn more about high fiber foods? Here are 13 Health Benefits of a High Fiber Diet.