
We may joke about fiber, but many of us aren't sure exactly what it is or how to be certain we're getting enough of it. Fiber is the indigestible portion of plant foods, most of which passes through our system unchanged. Since we lack the enzymes to digest fiber, we can't absorb any calories from it. But we can reap a multitude of health benefits.
There are two types of fiber: water-insoluble and water-soluble. The former, found in wheat bran and the skins of some fruits and vegetables, exits the body basically unchanged. It provides bulk and helps regulate the bowels. Water-soluble fiber is found in oats, beans, lentils, barley and most fruits and vegetables. This type of fiber absorbs water in the digestive tract, which is what helps you feel full and slows your digestion (everydayhealth.com)
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