Linseed Dietary Fibers Reduce Apparent Digestibility of Energy and Fat and Weight Gain in Growing Rats

Nutrients

Mette Kristensen²  Knud Erik Bach Knudsen³  Henry Jørgensen³  David Oomah¹  Susanne Bügel²  Søren Toubro⁴  Inge Tetens⁵ 

[1] Pacific Agri-Food Research Centre—Summerland, Agriculture and Agrifood Canada, Summerland, British Columbia V0H 1Z0, Canada; E-Mail:;Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, 1958 Frederiksberg C, Denmark; E-Mails:;Department of Animal Science—Molecular nutrition and cell biology, Aarhus University, 8830 Tjele, Denmark; E-Mails:;Reduce-Center, 4000 Roskilde, Denmark; E-Mail:;National Food Institute, DTU FOOD, 2860 Søborg, Denmark; E-Mail:

关键词: dietary fibers;    linseed;    fat digestibility;    obesity;   

DOI  :  10.3390/nu5083287

来源: mdpi

【 摘 要 】

Dietary fibers (DF) may affect energy balance, an effect often ascribed to the viscous nature of some water soluble DF, which affect luminal viscosity and thus multiple physiological processes. We have tested the hypothesis that viscous linseed DF reduce apparent nutrient digestibility, and limit weight gain, in a randomized feeding trial where 60 male, growing, Wistar rats, with an initial weight of ~200 g, were fed different diets (n = 10 per group): low DF control (C), 5% DF from cellulose (5-CEL), CEL + 5% DF from whole (5-WL) or ground linseed (5-GL), CEL + 5% DF from linseed DF extract (5-LDF), and CEL + 10% DF from linseed DF extract (10-LDF). Diets were provided ad libitum for 21 days. Feed intake and faecal output were measured during days 17–21. Faecal fat excretion increased with increasing DF content and was highest in the 10-LDF group. Apparent fat digestibility was highest with the C diet (94.9% ± 0.8%) and lowest (74.3% ± 0.6%) with the 10-LDF diet, and decreased in a non-linear manner with increasing DF (p < 0.001). Apparent fat digestibility also decreased with increased accessibility of DF (5-WL vs. 5-GL) and when the proportion of viscous DF increased (5-GL vs. 5-LDF). The 10-LDF resulted in a lower final body weight (258 ± 6.2 g) compared to C (282 ± 5.9 g), 5-CEL (281 ± 5.9 g), and 5-WL (285 ± 5.9 g) (p < 0.05). The 10-LDF diet reduced body fat compared to 5-CEL (p < 0.01). In conclusion, DF extracted from linseed reduced apparent energy and fat digestibility and resulted in restriction of body weight gain in growing rats.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.