Effect of oat β-glucan of different molecular weights on fecal bile acids, urine metabolites and pressure in the digestive tract – A human cross over trial

Salla Hakkola, Lotta Nylund, Natalia Rosa-Sibakov, Baoru Yang, Emilia Nordlund, Tapio Pahikkala, Marko Kalliomäki, Anna Marja Aura, Kaisa M. Linderborg (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

Abstract

While the development of oat products often requires altered molecular weight (MW) of β-glucan, the resulting health implications are currently unclear. This 3-leg crossover trial (n = 14) investigated the effects of the consumption of oat bran with High, Medium and Low MW β-glucan (average > 1000, 524 and 82 kDa respectively) with 3 consequent meals on oat-derived phenolic compounds in urine (UHPLC-MS/MS), bile acids in feces (UHPLC-QTOF), gastrointestinal conditions (ingestible capsule), and perceived gut well-being. Urine excretion of ferulic acid was higher (p < 0.001, p < 0.001), and the fecal excretion of deoxycholic (p < 0.03, p < 0.02) and chenodeoxycholic (p < 0.06, p < 0.02) acids lower after consumption of Low MW β-glucan compared with both Medium and High MW β-glucan. Duodenal pressure was higher after consumption of High MW β-glucan compared to Medium (p < 0.041) and Low (p < 0.022) MW β-glucan. The MW of β-glucan did not affect gut well-being, but the perceptions between females and males differed.

Original languageEnglish
Article number128219
JournalFood Chemistry
DOIs
Publication statusAccepted/In press - 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • Avenanthramides
  • Beta-glucan
  • Bile acids
  • Enzyme treatment
  • Gastrointestinal pressure
  • Molecular weight
  • Oat
  • Phenolic acids

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