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Effect of Lowering the Glycemic Load With Canola Oil on Glycemic Control and Cardiovascular Risk Factors: A Randomized Controlled Trial.
MedLine Citation:
PMID:  24929428     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Despite their independent cardiovascular disease (CVD) advantages, effects of α-linolenic acid (ALA), monounsaturated fatty acid (MUFA), and low-glycemic-load (GL) diets have not been assessed in combination. We therefore determined the combined effect of ALA, MUFA, and low GL on glycemic control and CVD risk factors in type 2 diabetes.RESEARCH DESIGN AND METHODS: The study was a parallel design, randomized trial wherein each 3-month treatment was conducted in a Canadian academic center between March 2011 and September 2012 and involved 141 participants with type 2 diabetes (HbA1c 6.5%-8.5% [48-69 mmol/mol]) treated with oral antihyperglycemic agents. Participants were provided with dietary advice on either a low-GL diet with ALA and MUFA given as a canola oil-enriched bread supplement (31 g canola oil per 2,000 kcal) (test) or a whole-grain diet with a whole-wheat bread supplement (control). The primary outcome was HbA1c change. Secondary outcomes included calculated Framingham CVD risk score and reactive hyperemia index (RHI) ratio.RESULTS: Seventy-nine percent of the test group and 90% of the control group completed the trial. The test diet reduction in HbA1c units of -0.47% (-5.15 mmol/mol) (95% CI -0.54% to -0.40% [-5.92 to -4.38 mmol/mol]) was greater than that for the control diet (-0.31% [-3.44 mmol/mol] [95% CI -0.38% to -0.25% (-4.17 to -2.71 mmol/mol)], P = 0.002), with the greatest benefit observed in those with higher systolic blood pressure (SBP). Greater reductions were seen in CVD risk score for the test diet, whereas the RHI ratio increased for the control diet.CONCLUSIONS: A canola oil-enriched low-GL diet improved glycemic control in type 2 diabetes, particularly in participants with raised SBP, whereas whole grains improved vascular reactivity.
Authors:
David J A Jenkins; Cyril W C Kendall; Vladimir Vuksan; Dorothea Faulkner; Livia S A Augustin; Sandra Mitchell; Christopher Ireland; Korbua Srichaikul; Arash Mirrahimi; Laura Chiavaroli; Sonia Blanco Mejia; Stephanie Nishi; Sandhya Sahye-Pudaruth; Darshna Patel; Balachandran Bashyam; Edward Vidgen; Russell J de Souza; John L Sievenpiper; Judy Coveney; Robert G Josse; Lawrence A Leiter
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-6-14
Journal Detail:
Title:  Diabetes care     Volume:  -     ISSN:  1935-5548     ISO Abbreviation:  Diabetes Care     Publication Date:  2014 Jun 
Date Detail:
Created Date:  2014-6-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7805975     Medline TA:  Diabetes Care     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2014 by the American Diabetes Association.
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