The effect of serum lipids and oxidized low-density lipoprotein of supplementing self-selected low-fat diets with soluble-fiber, soy, and vegetable protein foods

• Published in: Metabolism, clinical and experimental Vol. 49; no. 1; pp. 67 - 72
• Main Authors: Jenkins, David J.A., Kendall, Cyril W.C., Vidgen, Edward, Mehling, Christine C., Parker, Tina, Seyler, Hilda, Faulkner, Dorothea, Garsetti, Marcella, Griffin, Larry C., Agarwal, Sanjiv, Rao, A. Venket, Cunnane, Stephen C., Ryan, Mary Ann, Connelly, Philip W., Leiter, Lawrence A., Vuksan, Vladimir, Josse, Robert
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 2000; Elsevier
• Subjects: Adult; Aged; Biological and medical sciences; Cholesterol - blood; Cross-Over Studies; Diet, Fat-Restricted; Dietary Fiber - administration & dosage; Dietary Supplements; Female; Humans; Hyperlipidemias - blood; Lipids - blood; Lipoproteins - blood; Lipoproteins, LDL - blood; Male; Medical sciences; Middle Aged; Miscellaneous; Postmenopause; Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects); Soybean Proteins - administration & dosage; Triglycerides - blood; Human; Soy product; Treatment efficiency; Metabolic diseases; Lipids; Fat mass; Lipemia; Diet therapy; Conjugated dienic compound; Plant protein; Adult; Hyperlipemia; Supplementation; Dyslipemia; Dietary fiber; Restricted diet; Comparative study
• ISSN: 0026-0495; 1532-8600
• DOI: 10.1016/S0026-0495(00)90738-8

An increased intake of soluble fiber and soy protein by improve the blood lipid profile. To assess any additional benefit on serum lipids of providing soy protein and soluble-fiber foods to hyperlipidemic subjects already consuming low-fat, low-cholesterol therapeutic diets, 20 hyperlipidemic men and postmenopausal women completed 8-week test and control dietary treatments in a randomized crossover design as part of an ad libitum National Cholesterol Education Program (NCEP) step 2 therapeutic diet (<7% saturated fat and <200 mg/d cholesterol). During the test phase, foods high in soy, other vegetable proteins, and soluble fiver were provided. During the control phase, low-fat dairy and low—soluble-fiber foods were provided. Fasting blood lipid and apolipoprotein levels were measured at 4 and 8 weeks of each phase. On the test diet, 12 ± 2 g/d soy protein was selected from the foods chosen. Direct comparison of test and control treatments indicated an elevated high-density lipoprotein (HDL) cholesterol concentration on the test diet (6.4% ± 2.4%,
P = .013) and a significantly reduced total to HDL cholesterol ratio (−5.9% ± 2.3%,
P = .020). The proportion of conjugated dienes in the low-density lipoprotein (LDL) cholesterol fraction was significantly reduced (8.5% ± 3.3%,
P = .020) as a marker of oxidized LDL. A combination of acceptable amounts of soy, vegetable protein, and soluble-fiber foods as part of a conventional low-fat, low-cholesterol therapeutic diet is effective in further reducing serum lipid risk factors for cardiovascular disease.