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Safety and Effectiveness of Flaxseed for Reducing High Cholesterol

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00051415
Recruitment Status : Completed
First Posted : January 15, 2003
Last Update Posted : August 18, 2006
Information provided by:
National Center for Complementary and Integrative Health (NCCIH)

Brief Summary:
Flaxseed, a rich source of fiber, may be a significant component of a cholesterol-reducing diet. The purpose of this study is to evaluate the safety and effectiveness of flaxseed in reducing high cholesterol.

Condition or disease Intervention/treatment Phase
Hypercholesterolemia Behavioral: Flaxseed-supplemented diet Phase 2 Phase 3

Detailed Description:

Hypercholesterolemia is an established risk factor for atherosclerotic cardiovascular disease (ASCVD). The National Cholesterol Education Program estimates that 65 million Americans with hypercholesterolemia could be treated with diet and exercise alone. Flaxseed is a potential component of cholesterol-reducing diet regimens. Flaxseed contains significant amounts of soluble fiber and is a rich source of both alpha-linolenic acid and phytoestrogenic ligands, which have been implicated in the prevention of ASCVD. However, flaxseed's phytoestrogenic ligands may have undesirable hormonal effects. This study will systematically evaluate the safety and efficacy of ground flaxseed ingestion in both men and women with hypercholesterolemia.

Participants will be randomized to receive flaxseed or a matching wheat bran control. The test dose of flaxseed will be 40 grams administered in baked products (muffins, bread, or bars). The first 6 study weeks are a diet stabilization phase, followed by a 10-week study phase in which participants are expected to eat two servings of the test food daily. Blood and urine are collected for analysis, which will include measurement of low density lipoprotein cholesterol (LDL-C), post-prandial triglycerides, and urinary isoprostane secretion.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 60 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: A Double Blind, Randomized, Placebo Controlled Trial of Flaxseed in Patients With Hypercholesterolemia
Study Start Date : January 2003
Study Completion Date : January 2005

Resource links provided by the National Library of Medicine

Information from the National Library of Medicine

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Ages Eligible for Study:   45 Years to 75 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria

  • Men over 45 and post-menopausal women
  • LDL cholesterol > 130 mg/dl

Exclusion Criteria

  • Established heart, kidney, or liver disease
  • Diabetes
  • Cancer

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00051415

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United States, Pennsylvania
University of Pennsylvania
Philadelphia, Pennsylvania, United States, 19104
Sponsors and Collaborators
National Center for Complementary and Integrative Health (NCCIH)
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Principal Investigator: Philippe O Szapary, MD University of Pennsylvania
Layout table for additonal information Identifier: NCT00051415    
Other Study ID Numbers: R21AT001291-01 ( U.S. NIH Grant/Contract )
First Posted: January 15, 2003    Key Record Dates
Last Update Posted: August 18, 2006
Last Verified: July 2006
Keywords provided by National Center for Complementary and Integrative Health (NCCIH):
Additional relevant MeSH terms:
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Lipid Metabolism Disorders
Metabolic Diseases