Digestibility of Fibre
Fibres are structural and gel-forming polysaccharides that resist hydrolysis by mammalian enzymes. This resistance is a factor of both the conformation between glycoside linkages as well as secondary structures.[1] Secondary branching and alignment of fibres can be naturally occurring within the plant or are a consequence of the cooking process (i.e. resistant starches).[2][3] Insoluble, non-fermentable fibre passes through the gastrointestinal tract of both dogs and cats relatively unchanged, while fermentable dietary fibres can be utilized by bacteria within the large intestine to produce H2, CO2, CH4, and the short-chain fatty acids, acetate, propionate, and butyrate. Feeding diets with high soluble fibre contents slows gastrointestinal transit time,[4][5] decreases apparent digestibility of protein,[6][7][8] and delays carbohydrate absorption in both healthy[9][10][11] and diabetic cats and dogs.[12][13]Depending on the type of dietary fibre present, decreased cholesterol and triglyceride absorption may also occur.[14]
References
- ↑ Luptin JR and Turner ND. (2000) Dietary Fiber. In Biochemical and Physiological Aspects of Human Nutrition. 2000 Philadelphia, PA: WB Saunders Company p.143-154.
- ↑ Bach-Knudsen KE. (1997) Carbohydrate and lignin content of plant materials used in animal feeds. Anim Feed Sci Technol 1997;67:319-338.
- ↑ Berry SC. (1986) Resistant starch: Formation and measurement of starch that survives exhaustive digestion with amylolytic enzymes during determination of dietary fiber. J Cereal Sci 1986;4:301-304.
- ↑ Bednar GE, et al. (2001) Starch and fiber fractions in selected food and feed ingredients affect their small intestinal digestibility and fermentability and their large bowel fermentability in vitro in the canine model. J Nutr 2001;131:276-286.
- ↑ Burrows CF, et al. (1982) Effects of fiber on digestibility and transit time in dogs. J Nutr 1982;112:1726-1732.
- ↑ Muir HE, et al. (1996) Nutrient digestion by ileal cannulated dogs as affected by dietary fibers with various fermentation characteristics. J Anim Sci 1996;74:1641-1648.
- ↑ Silvio J, et al. (2000) Influences of fiber fermentation on nutrient digestion in the dog. Nutr 2000;16:289-295.
- ↑ Harper EJ. (1995) The effect of fiber on nutrient availability in cats of different ages. Vet Clin Nutr 1995;3:114.
- ↑ Muir HE, et al. (1996) Nutrient digestion by ileal cannulated dogs as affected by dietary fiber with various fermentation characteristics. J Anim Sci 1996;74:1641-1648.
- ↑ Nguyen P, et al. (1998) Glycemic and insulinemic response after ingestion of commercial foods in healthy dogs: Influence of food composition. J Nutr 1998;128:2654S-2658S.
- ↑ Buddington RK, et al. (1999) Influence of fermentable fiber on small intestinal dimensions and transport of glucose and proline in dogs. AJVR 1999;60:354-358.
- ↑ Nelson RW. (1989) The role of fiber in managing diabetes mellitus. Vet Med 1989;84:1156-1160.
- ↑ Nelson RW, et al. (2000) Effect of dietary insoluble fiber on control of glycemia in cats with naturally acquired diabetes mellitus. JAVMA 2000;216:1082-1088.
- ↑ Ikedo I, et al. (1989) Interrelated Effects of Dietary Fiber and Fat on Lymphatic Cholesterol and Triglyceride Absorption. J Nutr 1989;199:1383-1387.
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This article was: Date reviewed: 18 May 2015 |
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