title: Fourteen weeks of treatment with Viscofiber increased fasting levels of glucagon-like peptide-1 and peptide-YY.
abstract: Fermentable dietary fiber has been shown to cause fat loss and to increase peptide-YY (PYY) and glucagon-like peptide 1 (GLP-1) levels in rodents. In single meal tests, humans have an increase in PYY and GLP-1 to dietary fiber, but the response of these hormones to longer-term treatment is not known. Viscofiber (Cevena Bioproducts Inc., Edmonton, AB, Canada) is a high-viscosity fermentable dietary fiber made by a proprietary process from oats and barley. Seven healthy overweight and obese subjects were treated with a calorie-restricted diet, a lifestyle change program, and 4 g of Viscofiber/day for 16 weeks. Hunger, satiety, PYY, and GLP-1 were measured before and 1 hour after a standard meal test before and at week 14 of the study. Hunger and satiety were measured by Visual Analog Scales. PYY and GLP-1 were measured by radioimmunoassay and enzyme-linked immunosorbent assay, respectively. Weight was reduced 3.07 +/- 3.13 kg (P < .05) over the 16 weeks. Fasting PYY increased 8.67 +/- 6.62 pg/mL (P < .05) and fasting GLP-1 increased 2.67 +/- 0.84 pmol/L (P < .01) at 14 weeks compared to baseline. Satiety increased 1.78 +/- 1.43 cm (P < .01) at the 1-hour post-meal time point on week 14 compared to the study baseline. We conclude that 14 weeks of treatment with Viscofiber at 4 g/day along with a lifestyle change program and diet causes weight loss and increases fasting PYY, fasting GLP-1, and satiety at 1 hour following a standard meal, which extends the single meal test observations in humans.
authors.affiliation: Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA 70808, USA. greenwfl@pbrc.edu
authors.forename: Frank
authors.initials: F
authors.lastname: Greenway
authors.forename: Carol E
authors.initials: CE
authors.lastname: O'Neil
authors.forename: Laura
authors.initials: L
authors.lastname: Stewart
authors.forename: Jennifer
authors.initials: J
authors.lastname: Rood
authors.forename: Michael
authors.initials: M
authors.lastname: Keenan
authors.forename: Roy
authors.initials: R
authors.lastname: Martin
mesh_terms: D000328:Adult; D004043:Dietary Fiber / Q000008:administration & dosage* / Q000009:adverse effects; D005215:Fasting; D005260:Female; D005285:Fermentation; D052216:Glucagon-Like Peptide 1 / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D019894:Peptide YY / Q000097:blood*; D014783:Viscosity; D015431:Weight Loss
chemical_list: D004043:Dietary Fiber; D019894:Peptide YY; D052216:Glucagon-Like Peptide 1