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Soybean Based Diets and CVD Risk Factors

This study has been completed.
Information provided by (Responsible Party):
Tufts University Identifier:
First received: September 13, 2005
Last updated: November 22, 2011
Last verified: November 2011

To evaluate the impact of soybean processing as well as the effect of soy relative to animal protein, independent of alterations in the fatty acid profile of the diet on CVD risk factors in hypercholesterolemic subjects.

Condition Intervention Phase
Behavioral: Soy protein
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Crossover Assignment
Masking: Double Blind (Subject, Investigator)
Primary Purpose: Treatment
Official Title: Impact of Different Forms of Soybean Based Foods on Cardiovascular Disease Risk Factors in Hypercholesterolemic Subjects.

Resource links provided by NLM:

Further study details as provided by Tufts University:

Primary Outcome Measures:
  • Fasting and non-fasting plasma lipids, apolipoproteins; end of each dietary phase
  • Vascular endothelial function; end of each dietary phase
  • Susceptibility of LDL to oxidation; end of each dietary phase
  • C-reactive protein; end of each dietary phase

Secondary Outcome Measures:
  • Endogenous cholesterol synthesis; end of each dietary phase
  • Endogenous triglyceride synthesis; end of each dietary phase
  • Plasma and Urinary Isoflavone levels; end of each dietary phase
  • Genotyping of candidate genes involved in the variability observed in response to dietary modification

Enrollment: 30
Study Start Date: June 2001
Study Completion Date: May 2005
Primary Completion Date: May 2005 (Final data collection date for primary outcome measure)
Detailed Description:

Recent data suggests that the magnitude of the effect of soy protein on lipid and lipoprotein levels is variable and less dramatic than originally reported. This discordance might be attributable to the forms of soy protein used, as well as subtle unrecognized shifts in the fatty acid, cholesterol and fiber content of the diets.The aim of the present investigation is to assess the effects of different forms of soybeans (whole bean and products made thereof), products derived from soy flour (textured soy protein) and products made from a soybean extract (i.e. tofu, yogurt) relative to animal protein, independent of alterations in the fatty acid profile of the diet on CVD risk factors in hypercholesterolemic subjects. The intent is to isolate any potential impact of processing on the plasma lipid lowering efficacy of the soy product or soy protein relative to animal protein.


Ages Eligible for Study:   50 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

Plasma LDL-C >120mg/dL, Free from chronic illness, Not taking medications known to affect lipid metabolism (lipid lowering drugs, beta-blockers, fish-oil capsules, cis-retinoic acid, ascorbic acid, vitamin E, diuretics or hormones), Post-menopausal women.

Exclusion Criteria:

Soy allergy, Smokers, Consuming >2 alcoholic drinks per day, Pre-menopausal women.

  Contacts and Locations
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Please refer to this study by its identifier: NCT00175097

United States, Massachusetts
Division of Cardiology, Tufts-New England Medical Center Hospitals, Tufts University School of Medicine
Boston, Massachusetts, United States, 02111
Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University
Boston, Massachusetts, United States, 02111
Sponsors and Collaborators
Tufts University
Principal Investigator: Alice H Lichtenstein, DSc Tufts University (HNRCA)
  More Information

No publications provided

Responsible Party: Tufts University Identifier: NCT00175097     History of Changes
Other Study ID Numbers: HL 58008-1785, RO1 HL-58008
Study First Received: September 13, 2005
Last Updated: November 22, 2011
Health Authority: United States: Institutional Review Board

Keywords provided by Tufts University:
soy protein
endothelial function

Additional relevant MeSH terms:
Lipid Metabolism Disorders
Metabolic Diseases processed this record on November 27, 2014