Journal
JOURNAL OF NUTRITION
Volume 140, Issue 9, Pages 1633-1637Publisher
OXFORD UNIV PRESS
DOI: 10.3945/jn.110.123224
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Funding
- National Engineering Research Council
- Canada Research Chair Endowment of the Federal Government of Canada
- Loblaw Companies Ltd
- Unilever Canada Inc
- Canadian Institutes of Health Research
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High-protein diets have been advocated for weight loss and the treatment of diabetes. Yet animal protein sources are often high in saturated fat and cholesterol. Vegetable protein sources, by contrast, are low in saturated fat and without associated cholesterol. We have therefore assessed the effect on serum lipids of raising the protein intake by 5% using a cereal protein, barley protein, as part of a standard therapeutic diet. Twenty-three hypercholesterolemic men and postmenopausal women completed a randomized crossover study comparing a bread enriched with either barley protein or calcium caseinate [30 g protein, 8374 kJ (2000 kcal)] taken separately as two 1-mo treatment phases with a minimum 2-wk washout. Body weight and diet history were collected weekly during each treatment. Fasting blood samples were obtained at wk 0, 2, and 4. Palatability, satiety, and compliance were similar for both the barley protein- and casein-enriched breads, with no differences between the treatments in effects on serum LDL cholesterol or C-reactive protein, measures of oxidative stress, or blood pressure. Nevertheless, because no adverse effects were observed on cardiovascular risk factors, barley protein remains an additional option for raising the protein content of the diet. J. Nutr. 140: 1633-1637, 2010.
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