Whey Protein Combined with Low Dietary Fiber Improves Lipid Profile in Subjects with Abdominal Obesity: A Randomized, Controlled Trial
Journal article, 2019

Abdominal obesity is associated with elevated postprandial triglycerides (TG), an independent risk factor for cardiovascular diseases. Previous studies show that whey protein (WP) and dietary fiber may separately reduce postprandial TG. However, few studies have investigated the long-term effects of WP and dietary fiber on postprandial TG. We aimed to investigate the separate and combined long-term effects of WP and dietary fiber from wheat bran on postprandial TG and markers of lipid metabolism in subjects with abdominal obesity. We conducted a 12-week, double-blind, randomized, controlled, parallel intervention study. In a 2 × 2 factorial design, 73 adults were randomized to receive 60 g/day of either WP hydrolysate or maltodextrin (MD) combined with high-fiber wheat bran products (HiFi; 30 g dietary fiber/day) or low-fiber refined wheat products (LoFi; 10 g dietary fiber/day). A high-fat meal test was conducted before and after the intervention. Sixty-five subjects were included in the final analyses. There were no differences between intervention groups in postprandial TG assessed as incremental area under the curve (iAUC). WP-LoFi had reduced postprandial TG assessed as total area under the curve (tAUC) and reduced fasting TG compared with all other groups, and reduced fasting apolipoprotein B-48 compared with MD-LoFi. There were no changes in lipoprotein lipase activity. Total cholesterol and apolipoprotein B-100 were reduced after WP intake compared with MD. Total cholesterol was increased after HiFi intake compared with LoFi. In conclusion, intake of WP in combination with low-fiber cereal products for 12 weeks had beneficial effects on postprandial TG tAUC and fasting TG, but not on postprandial TG iAUC in subjects with abdominal obesity. Combining WP with high-fiber wheat bran products did not improve lipid profile.

postprandial lipemia

dietary fiber


whey protein

abdominal obesity


Elin Rakvaag

Arhus Universitetshospital

Rasmus Fuglsang-Nielsen

Arhus Universitetshospital

Knud Erik Bach Knudsen

Aarhus University

Rikard Landberg

Chalmers, Biology and Biological Engineering, Food and Nutrition Science

Astrid Johannesson Hjelholt

Arhus Universitetshospital

Esben Søndergaard

Arhus Universitetshospital

Kjeld Hermansen

Aarhus University

Arhus Universitetshospital

Søren Gregersen

Steno Diabetes Center

Arhus Universitetshospital


2072-6643 (ISSN) 20726643 (eISSN)

Vol. 11 9 2091

Subject Categories

Other Clinical Medicine

Food Science

Nutrition and Dietetics





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