There are different sources of fiber and the type of fiber varies from
source to
source. Types of
fiber can be categorized in several ways, for example, by their
source. The most common sources of fiber include fruits and vegetables, wheat or oat bran, psyllium seed (e.g., Metamucil, Konsyl), synthetic methyl cellulose (e.g., Citrucel), and polycarbophil (e.g., Equilactin, Konsyl Fiber). Polycarbophil often is combined with calcium (e.g., Fibercon).