Americans tend to skimp when it comes to “whole” fiber intake. Many products on the supermarket shelves contain “isolated fiber” (the fiber food manufactures add to foods that would not naturally contain fiber), which does not provide the same benefits. Sources of fiber that support weight loss, satiety, heart health, and digestion derive from natural plant sources: vegetables, fruit, and whole grains. A healthy diet contains 25–38 grams per day of fiber, from a variety of sources. Fiber's ability to control blood sugars and hunger makes it an important part of a meal or snack.

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