Preparation of a dietary fiber mixture derived from different sources and its metabolic effects in rats.
In this study we analyzed a commercial dietary fiber blend known as Fiber-Plus and a dietary fiber mixture (DFM) prepared in our lab (10% apple pectin, 10% orange pectin, 36% locust bean gum and 44% corncob composed of 56% fiber). DFM provided greater inhibition of starch digestion and glucose absorption (p < 0.05) than did Fiber-Plus. DFM was also found to be significantly more efficient (p < 0.05) than Fiber-Plus at reducing the glycemic response following starch loading. Rats fed DFM or corncob demonstrated a much lower glycemic response following a test meal as compared to those fed a fiber-free diet. Both fiber sources decreased fasting cholesterol and triglyceride concentrations; transit time was shortened and fecal values were higher than those of controls. beta-glucuronidase activity in intestinal segment contents and feces was lower in rats fed fiber. We conclude that DFM is effective in controlling plasma glucose and lipid levels. Corncob, a novel fiber source, could be beneficial in the treatment of gastrointestinal tract disorders and in the elimination of carcinogenic elements.
Hazan
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A
Department of Biochemistry and Human Nutrition, Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot, Israel.
Madar
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Z
D000818:Animals; D001786:Blood Glucose / Q000378:metabolism*; D002784:Cholesterol / Q000097:blood*; D004043:Dietary Fiber; D005243:Feces / Q000737:chemistry; D005966:Glucuronidase / Q000378:metabolism; D007422:Intestines / Q000201:enzymology; D008297:Male; D010368:Pectins / Q000032:analysis; D051381:Rats; D014280:Triglycerides / Q000097:blood*; D003313:Zea mays
D001786:Blood Glucose; D004043:Dietary Fiber; D014280:Triglycerides; D010368:Pectins; D002784:Cholesterol; D005966:Glucuronidase