Psyllium and methylcellulose fermentation properties in relation to insoluble and soluble fiber standards
1997
Campbell, J.M. | Fahey, G.C. Jr
Psyllium (two husk sizes), methylcellulose (three viscosity grades), pectin, and Solka Floc were fermented in vitro with human fecal inoculum for 4, 12, and 24 h to assess organic matter disappearance (OMD), short chain fatty acid (SCFA) production, and gas production and composition. Substrate OMD was greatest for pectin following by methylcellulose, psyllium, and Solka Floc. Pectin fermentation produced the highest total SCFA followed by psyllium, Solka Floc, and methylcellulose. Total gas production correlated well with SCFA production and ranged from 108.1 (pectin) to 0.57 (methylcellulose 15) microliters/g OM. Differences in SCFA and gas production may affect clinical properties; therefore, fermentative characteristics of fibrous ingredients should be considered when evaluating the fiber sources for supplementation purposes.
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