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

摘要

While the development of oat products often requires altered molecular weight (MW) of beta-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 beta-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 beta-glucan compared with both Medium and High MW beta-glucan. Duodenal pressure was higher after consumption of High MW beta-glucan compared to Medium (p 0.041) and Low (p 0.022) MW beta-glucan. The MW of beta-glucan did not affect gut well-being, but the perceptions between females and males differed.