[Physico-chemical properties related to gastrointestinal function of 6 sources of dietary fiber].
The physicochemical properties of the six sources of dietary fiber more commonly consumed in Mexico were studied. The knowledge of these properties may allow a prediction of the functional effect of the fibers on the GI tract. The content of dietary fiber varied from 43% in wheat bran (WB) to 87% in Psyllium plantago (PP). Glucomannan (GM) showed the highest proportion of soluble fiber (97%) followed by dried cactus from Opuntia sp (DC) (28%) and PP (13%), whereas WB and soy isolate (SI) showed the highest proportion of insoluble fiber (95 and 92%, respectively). PP and GM showed a higher water holding capacity and viscosity and a lower ion exchange capacity: we anticipate that these fibers would be more effective to regulate plasma levels of glucose and cholesterol in contrast, WB and SI with a lower water holding capacity and viscosity and a higher proportion of insoluble fiber would be more effective to increase fecal bulk. Fibers from DC and from cactus fiber isolate were intermediate in these responses.
Departmento de Fisiología de la Nutrición, Instituto Nacional de la Nutrición Salvador Zubirán, México, D.F.
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Díaz
D000042:Absorption; D002412:Cations / Q000032:analysis; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004041:Dietary Fats / Q000493:pharmacokinetics; D004043:Dietary Fiber / Q000032:analysis*; D004044:Dietary Proteins / Q000032:analysis; D004068:Digestive System Physiological Phenomena; D006801:Humans; D008351:Mannans / Q000737:chemistry; D008800:Mexico; D010316:Particle Size; D010940:Plant Proteins / Q000032:analysis; D010945:Plants, Edible / Q000737:chemistry; D011620:Psyllium / Q000737:chemistry; D012995:Solubility; D013025:Glycine max / Q000737:chemistry; D014783:Viscosity; D014867:Water
D002412:Cations; D004041:Dietary Fats; D004043:Dietary Fiber; D004044:Dietary Proteins; D008351:Mannans; D010940:Plant Proteins; D014867:Water; C022901:(1-6)-alpha-glucomannan; D011620:Psyllium
Propiedades fisicoquímicas relacionadas con función gastrointestinal de seis fuentes de fibra dietética.