Lesson 3 Outline_Fiber

Lesson 3 Outline_Fiber - Lecture 2: All About Dietary Fiber...

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Lesson 3 1. Types and sources of dietary fiber  -All types of plant foods contain dietary fiber including: -cellulose- most abundant type of fiber.  Similar to starch except has Beta 1,4         linkage -pectins -gums      -Dietary fiber is indigestible and contains no calories 2. Cellulose versus Starch  Starch-  glucose molecules joined b alpha 1-4 linkage Cellulose- glucose molecules in Beta 1-4 linkages -humans cannot digest cellulose 3. Two classes of Dietary Fiber -Soluble- pectin and gums - will dissolve in water yielding a clear solution eg benefiber -lowers cholesterol and helps lower blood sugar -found in peas and beans, and apples and oranges -Insoluble- cellulose will not dissolve in water - resembles small cereal flakes eg wheat bran -absorbs large quantities of water and prevents constipation -reduces risk of cancer, and diverticulosis
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This note was uploaded on 03/30/2008 for the course FOOD SCI 120 taught by Professor Ingraham during the Spring '08 term at Wisconsin.

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Lesson 3 Outline_Fiber - Lecture 2: All About Dietary Fiber...

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