Definition Dietary fiber is defined to be plant components that are not broken down by human digestive enzymes. In the late 20th century, only lignin and some polysaccharides were known to satisfy this definition, but in the early 21st century, resistant starch and oligosaccharides were included as dietary fiber components. The most accepted definition of dietary fiber is “ all polysaccharides and lignin, which are not digested by the endogenous secretion of the human digestive tract ,” and currently, most animal nutritionists are using either a physiological definition “ the dietary components resistant to degradation by mammalian enzymes ” or a chemical definition “ the sum of non-starch polysaccharides (NSP) and lignin .” Lignin, a major dietary insoluble fiber source, may alter the rate and metabolism of soluble fibers. Other types of insoluble fiber, notably resistant starch, are fermented to produce short-chain fatty acids, which are sources of energy for colonocytes. A diet rich in dietary fiber and whole grains may lower rates of coronary heart disease, colon cancer, and type 2 diabetes.
Definition Dietary fiber is defined to be plant components that are not broken down by human digestive enzymes. In the late 20th century, only lignin and some polysaccharides were known to satisfy this definition, but in the early 21st century, resistant starch and oligosaccharides were included as dietary fiber components. The most accepted definition of dietary fiber is " all polysaccharides and lignin, which are not digested by the endogenous secretion of the human digestive tract ". Currently, most animal nutritionists are using either a physiological definition , " the dietary components resistant to degradation by mammalian enzymes ", or a chemical definition , " the sum of non-starch polysaccharides (NSP) and lignin ". Lignin, a major dietary insoluble fiber source, may alter the rate and metabolism of soluble fibers. Other types of insoluble fiber, notably resistant starch, are fermented to produce short-chain fatty acids, which are sources of energy for colonocytes. A diet rich in dietary fiber and whole grains may lower rates of coronary heart disease, colon cancer, and type 2 diabetes.
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