Fiber Flashcards
Dietary Fiber is Fiber found where?
In Food
Functional Fiber is Fiber found where?
Fiber added to Foods or taken as supplements
Fiber contains what kind of glycosidic linkages?
B1-4 bonds (non-digestible in humans)
Which dietary fibers are nonfermentable?
Ligin
Cellulose
Which dietary fibers are Insoluble?
Ligin
Cellulose
Hemicellulose
Pectins
Other than Nonfermentable & Insoluble, what are some additional dietary fibers?
B-Glucans
Gums
Fructans
Resistance Starches
Which soluble dietary fibers are fermentable?
Fructans
Pectins
B-Glucans
Gums
Psyllium
Which soluble dietary fibers are Viscous Gel-Forming?
Pectins
B-Glucans
Gums
Psyllium
What is water holding capacity?
How much water can be absorbed into the gel-like substance that is formed when mixing.
Water holding capacity is greatest in fibers with?
Intramolecular Bonding
(soluble > insoluble)
Viscosity in fiber is?
the ability to bind to organic/inorganic compounds.
(soluble>insoluble)
Ion-Exchange Capacity in fiber is?
ability of fiber to find to minerals
In fiber, the binding of organic compounds favors?
Soluble over insoluble
In Bacterial Fermentation, the only fiber type that cant be digested?
Lignin (antioxidant)
Delayed gastric emptying favors which type of fiber?
Soluble > Insoluble
How does fiber affect satiety?
Distention due to water holding. Delay’s gastric emptying.
Intestinal transit time is altered how with insoluble & soluble fiber?
Insoluble: normal
Soluble: delayed
How does viscosity alter nutrient absorption?
Interferes with mixing of intestinal contents with digestive enzymes
How does fiber affect free radicals?
Reduces free radicals
Fermentation of SCFA’s can result in what in the intestinal wall?
Hyperplasia
In diverticulitis, fiber should be?
decreased
What is the ADA for fiber?
20 g/d
What is the DRI for women?
25g
What is the DRI for men?
38g
What is the upper limit of fiber intake?
35-50
