title: Digestive physiological outcomes related to polydextrose and soluble maize fibre consumption by healthy adult men.
abstract: The objective of the present study was to evaluate digestive physiological outcomes elicited by functional fibres fed to healthy adult men. A total of twenty-one healthy adult men were utilised in a cross-over design. Each subject received polydextrose (PDX) or soluble maize fibre (SCF) (21 g/d) or no supplemental fibre (no fibre control; NFC) in a snack bar. Periods were 21 d and faeces were collected during the last 5 d of each period. Food intake, including fibre intake, did not differ among treatments. Flatulence (P = 0·001) and distention (P = 0·07) were greatest when subjects consumed PDX or SCF. Reflux was greater (P = 0·04) when subjects consumed SCF compared with NFC. All tolerance scores were low ( < 2·5), indicating only slight discomfort. Faecal ammonia, 4-methylphenol, indole and branched-chain fatty acid concentrations were decreased (P < 0·01) when subjects consumed the functional fibre sources compared with NFC. Faecal acetate, propionate and butyrate concentrations were lower (P < 0·05) when subjects consumed PDX compared with SCF and NFC. Faecal pH was lower (P = 0·01) when subjects consumed SCF compared with NFC, while PDX was intermediate. Faecal wet weight was greatest (P = 0·03) when subjects consumed SCF compared with NFC. Faecal dry weight tended to be greater (P = 0·07) when subjects consumed PDX compared with NFC. The functional fibres led to 1·4 and 0·9 g (PDX and SCF, respectively) increases in faecal dry mass per g supplemental fibre intake. Bifidobacterium spp. concentrations were greater (P < 0·05) when subjects consumed SCF compared with NFC. These functional fibres appear to be beneficial to gut health while leading to minimal gastrointestinal upset.
authors: Department of Animal Sciences, University of Illinois, 1207 West Gregory Drive, Urbana, IL 61801, USA.
authors: Brittany M Vester
authors: BM
authors: Boler
authors: Mariana C Rossoni
authors: MC
authors: Serao
authors: Laura L
authors: LL
authors: Bauer
authors: Michael A
authors: MA
authors: Staeger
authors: Thomas W
authors: TW
authors: Boileau
authors: Kelly S
authors: KS
authors: Swanson
authors: George C
authors: GC
authors: Fahey
mesh_terms: D000328:Adult; D018592:Cross-Over Studies; D004269:DNA, Bacterial / Q000235:genetics / Q000302:isolation & purification; D004043:Dietary Fiber / Q000008:administration & dosage* / Q000009:adverse effects; D004068:Digestive System Physiological Phenomena; D005243:Feces / Q000737:chemistry / Q000382:microbiology; D005285:Fermentation; D005414:Flatulence / Q000209:etiology; D005764:Gastroesophageal Reflux / Q000209:etiology; D005936:Glucans / Q000008:administration & dosage* / Q000009:adverse effects; D006801:Humans; D008297:Male; D054892:Metagenome; D056692:Prebiotics; D012995:Solubility; D055815:Young Adult; D003313:Zea mays
chemical_list: D004269:DNA, Bacterial; D004043:Dietary Fiber; D005936:Glucans; D056692:Prebiotics; C033375:polydextrose