Product Description
FUNCTIONS Dietary fiber is defined as complex carbohydrates that are resistant to the action of digestive enzymes, and therefore pass through the intestinal tract, unabsorbed. Dietary fiber includes substances such as cellulose, hemicellulose (xylans, galactans and mannans), pectins, gums, and lignin.
Dietary fiber has many nutritional benefits for the health of the gastrointestinal tract. Insoluble dietary fiber, such as cellulose and many hemicelluloses, are not efficiently fermented in the colon. As a result, they provide fecal bulk, bind water, and help soften stools. Soluble dietary fiber, such as pectin, many gums, and some hemicelluloses, are fermented in the colon to varying degrees. This results in lower colonic pH (acidity) and the production of short chain fatty acids, which are important for the intestinal microflora and the health of the mucosal cells. Short chain fatty acids also have a role in facilitating colonic water absorption.
Many insoluble and soluble fiber types bind dietary cholesterol and bile acids in the intestine, and therefore play an important nutritional role in the enterohepatic circulation of cholesterol and cholesterol metabolism in general.
Most types of dietary fiber, when hydrated, contribute substantially to the volume of stomach contents and help provide a feeling of fullness.
Dietary fiber has many nutritional benefits for the health of the gastrointestinal tract. Insoluble dietary fiber, such as cellulose and many hemicelluloses, are not efficiently fermented in the colon. As a result, they provide fecal bulk, bind water, and help soften stools. Soluble dietary fiber, such as pectin, many gums, and some hemicelluloses, are fermented in the colon to varying degrees. This results in lower colonic pH (acidity) and the production of short chain fatty acids, which are important for the intestinal microflora and the health of the mucosal cells. Short chain fatty acids also have a role in facilitating colonic water absorption.
Many insoluble and soluble fiber types bind dietary cholesterol and bile acids in the intestine, and therefore play an important nutritional role in the enterohepatic circulation of cholesterol and cholesterol metabolism in general.
Most types of dietary fiber, when hydrated, contribute substantially to the volume of stomach contents and help provide a feeling of fullness.
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References
Anderson JW, Jones AE, Riddell-Mason S. Ten different dietary fibers have significantly different effects on serum and liver lipids of cholesterol-fed rats. J Nutr 1994;124:78-83. Arvill A, Bodin L. Effect of short-term ingestion of konjac glucomannan on serum cholesterol in healthy men. Am J Clin Nutr 1995;61:585-589. Asp N-G. Nutritional classification and analysis of food carbohydrates. Am J Clin Nutr 1994;59 Suppl.679S-681S. Berggren AM, Björck IME, Nyman EMGL, Eggum BO. Short-chain fatty acid content and pH in caecum of rats given various sources of carbohydrates. J Sci Food Agric 1993;63:397-406. Cerda JJ, Normann SJ, Sullivan MP, et al. Inhibition of atherosclerosis by dietary pectin in microswine with sustained hypercholesterolemia. Circulation 1994;89:1247-1253. Evans MA, Shronts EP. Intestinal fuels: glutamine, short-chain fatty acids, and dietary fiber. J Am Diet Assoc 1992;92:1239-46, 1249. Ferguson LR, Roberton AM, Watson ME, Kestell P, Harris PJ. The adsorption of a range of dietary carcinogens by a-cellulose, a model insoluble dietary fiber. Mutat Res Genet Toxicol Testing 1993;319:257- 266. Fernandez ML, Sun DM, Tosca MA, McNamara DJ. Citrus pectin and cholesterol interact to regulate hepatic cholesterol homeostasis and lipoprotein metabolism: A dose-response study in guinea pigs. Am J Clin Nutr 1994;59:869-878. Harris PJ, Ferguson LR. Dietary fibre: Its composition and role in protection against colorectal cancer. Mutat Res Fundam Mol Mech Mutagen 1993;290:97-110. Hexeberg S, Hexeberg E, Willumsen N, Berge RK. A study on lipid metabolism in heart and liver of cholesterol-and pectin-fed rats. Br J Nutr 1994;71:181-192.Also Recommended
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