What are WHFoods' recommendations for fiber intake?

Food groups richest in fiber include Beans and Legumes, Vegetables, Fruits, Grains, and Nut and Seeds. Because different proportions of insoluble/soluble fiber, viscous/non-viscous fiber, and fermentable fiber can be found within each of these different ...

from The World's Healthiest Foods http://ift.tt/1SKN3XS