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Obesity (Silver Spring). 2016 Nov;24(11):2261-2268. doi: 10.1002/oby.21584.

Effects of canola and high-oleic-acid canola oils on abdominal fat mass in individuals with central obesity.

Author information

Department of Nutritional Sciences, The Pennsylvania State University, University Park, Pennsylvania, USA.
Department of Nutritional Sciences, The Pennsylvania State University, University Park, Pennsylvania, USA.
Department of Biobehavioral Health, The Pennsylvania State University, University Park, Pennsylvania, USA.
Institute of Nutrition and Functional Foods, Laval University, Quebec City, Quebec, Canada.
Department of Nutritional Sciences, University of Toronto, Toronto, Ontario, Canada.
Richardson Center for Functional Foods and Nutraceuticals, University of Manitoba, Winnipeg, Manitoba, Canada.
Keenan Research Centre for Biomedical Science of St. Michael's Hospital, Toronto, Ontario, Canada.



To determine the effect of diets low in saturated fatty acids and high in monounsaturated fatty acids (MUFA) or polyunsaturated fatty acids on body composition in participants at risk for metabolic syndrome (MetS).


This study was a randomized, crossover, controlled feeding study. Participants (n = 101, ages 49.5 ± 1.2, BMI 29.4 ± 0.4 kg/m2 ) were randomized to five isocaloric diets containing treatment oils: Canola, CanolaOleic, CanolaDHA, Corn/Safflower, and Flax/Safflower. Each diet period was 4 weeks followed by a 2- to 4-week washout period.


Canola (3.1 kg, P = 0.026) and CanolaOleic oil diets (3.09 kg, P = 0.03) reduced android fat mass compared with the Flax/Saff oil diet (3.2 kg), particularly in men. The decrease in abdominal fat mass was correlated with the reduction in blood pressure after the Canola (systolic blood pressure: r = 0.26, P = 0.062; diastolic blood pressure: r = 0.38, P = 0.0049) and CanolaOleic oil diets (systolic blood pressure: r = 0.39 P = 0.004; diastolic blood pressure: r = 0.45, P = 0.0006). The decrease in abdominal fat mass also was associated with a reduction in triglyceride levels after the CanolaOleic oil diet (r = 0.42, P = 0.002).


Diets high in MUFA (compared with PUFA) reduced central obesity with an accompanying improvement in MetS risk factors. Diets high in MUFA may be beneficial for treating and perhaps preventing MetS.


[Indexed for MEDLINE]
Free PMC Article

Conflict of interest statement

PJHJ received grants from Advanced Foods and Materials Network, Danone, Enzymotec, Unilever, the Canadian Institutes of Health Research (CIHR) and Canada Research Chair Endowment of the Federal Government of Canada. PJHJ also serves as President of Nutritional Fundamentals for Health Inc. BL and PC received research grants from CIHR, Agrifood and Agriculture Canada, the Dairy Farmers of Canada, Dairy Australia. BL received research funding from the Danone Institute and Atrium Innovations and honoraria from Unilever, Danone. BL is Chair of the Expert Scientific Advisory Council of Dairy Farmers of Canada and is Chair of Nutrition,supported by endowments from Provigo/Loblaws, Pfizer and Royal Bank of Canada. DJAJ serves on the Scientific Advisory Board of Unilever, Sanitarium Company, California Strawberry Commission, Loblaw Supermarket, Herbal Life International, Nutritional Fundamental for Health, Pacific Health Laboratories, Metagenics, Bayer Consumer Care, Orafti, Dean Foods, Kellogg’s, Quaker Oats, Procter & Gamble, Coca-Cola, NuVal Griffin Hospital, Abbott, Pulse Canada, Saskatchewan Pulse Growers, and Canola Council of Canada. He has received honoraria from the Almond Board of California, International Tree Nut Council Nutrition Research and Education Foundation, Barilla, Unilever Canada, Solae, Oldways, Kellogg’s, Quaker Oats, Procter & Gamble, Coca-Cola, NuVal Griffin Hospital, Abbott, Canola Council of Canada, Dean Foods, California Strawberry Commission, Haine Celestial, and Alpro Foundation. He serves on the speakers panel for the Almond Board of California; has received research grants from Loblaw Brands Ltd, Unilever, Barilla, Almond Board of California, Solae, Haine Celestial, Sanitarium Company, Orafti, International Tree Nut Council, and the Peanut Institute; and travel support from the Almond Board of California, Unilever, Alpro Foundation, International Tree Nut Council, Canadian Institutes for Health Research, Canada Foundation for Innovation, and the Ontario Research Fund. He receives salary support as a Canada Research Chair from the federal government of Canada and his wife is a director of Glycemic Index Laboratories, Toronto, Ontario, Canada. SGW has received research funding and consulting and travel fees from the Canola Council of Canada and Flax Canada 2013. PMK-E serves on the California Walnut Commission Scientific Advisory Council, McDonald’s Global Advisory Council, and the Avocado Nutrition Science Advisory Other authors did not report any conflicts of financial interest.

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