Where can I find information about types of fiber and their health effects? How much fiber should I eat?

The fiber in foods is generally broken down into two broad types—soluble (also called viscous) and insoluble. Both types have important health effects. For more information about dietary fibers, go to Food Composition > Macronutrients > Fiber.

According to the DRIs, the recommended intake for total fiber for adults up to 50 years of age is 25 grams per day for women and 38 grams per day for men. For those over 50, the recommended intake is 21 grams per day for women and 30 grams per day for men. See the DRI Macronutrient Table.

These resources provide more information about the types of fiber, their functions in the body and food sources: