Dietary Rapeseed Oil Supplementation Reduces Hepatic Steatosis in Obese Men—A Randomized Controlled Trial. Issue 21 (7th October 2020)

• Record Type: Journal Article
• Authors: Kruse, Michael; Kemper, Margrit; Gancheva, Sofiya; Osterhoff, Martin; Dannenberger, Dirk; Markgraf, Daniel; Machann, Jürgen; Hierholzer, Johannes; Roden, Michael; Pfeiffer, Andreas F. H.
• Is Part Of: Molecular nutrition & food research. Volume 64:Issue 21(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-10-07
• Subjects: hepatic steatosis -- obesity -- olive oil -- rapeseed oil -- serum lipids; Food -- Biotechnology -- Periodicals; Food -- Microbiology -- Periodicals; Nutrition -- Periodicals; Food -- Toxicology -- Periodicals; Nutrition -- Periodicals; Food Microbiology -- Periodicals; Food Technology -- Periodicals; Molecular Biology -- Periodicals; 664.0705
• DOI: 10.1002/mnfr.202000419
• Languages: English
• ISSNs: 1613-4125

Abstract

Abstract : Scope: Effective treatment for obesity associated non‐alcoholic fatty liver disease (NAFLD) is limited. Dietary supplementation of n‐3 polyunsaturated fatty acids, specifically alpha linolenic acid (ALA), can resolve intrahepatic lipid content (IHL). This study investigates the effect of daily supplementation of either refined rapeseed (RA), containing high amounts of ALA, or refined olive (OL) oil on IHL and glucose metabolism in NAFLD patients. Methods and results: 27 obese men consumed an isocaloric diet including either 50 g of RA or OL daily for 8 weeks. Hepatic proton magnetic resonance spectroscopy, hyperinsulinemic–euglycemic clamp studies and blood tests are performed before and at the end of the study. At 8 weeks a significant reduction in IHL is observed for RA (13.1 ± 1.6 before versus 11.1 ± 1.6% after intervention) versus OL (13.3 ± 2.5 before versus 15.7 ± 2.7% after intervention). For RA, a 21% reduction ( P < 0.02) in serum free fatty acids (FFA) and a 1.68‐fold increase ( P = 0.03) of serum interleukin‐6 (IL‐6) is observed after 8 weeks. Conclusion: RA has a beneficial effect on hepatic lipid metabolism as shown by reduced IHL and serum FFA. RA induced IL‐6 production seems to be liver protective confirming previous results. Abstract : Obesity is associated with non‐alcoholic fatty liver disease. Isocaloric dietary supplementation with 50 g per day of rapeseed oil, containing n‐3 polyunsaturated fatty acids, for 8 weeks reduces intrahepatic fat, serum free fatty acids, but increases serum interleukin‐6 in obese men. These effects are not observed when an isolcaloric diet containing 50 g per day of olive oil was given.