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Effects of Dietary Antioxidants on Cardiovascular Risk Factors
This study is ongoing, but not recruiting participants.
First Received: September 19, 2008   Last Updated: December 8, 2008   History of Changes
Sponsored by: Stanford University
Information provided by: Stanford University
ClinicalTrials.gov Identifier: NCT00756405
  Purpose

The aim of the Antioxidant Study is to compare the efficacy of foods naturally rich in antioxidants with that of antioxidants in a pill form on markers of inflammation and plasma cholesterol in healthy adults at risk of cardiovascular disease.


Condition Intervention
Obesity
Hyperlipidemia
Insulin Resistance
Hypertension
Behavioral: Antioxidants from supplements vs foods

MedlinePlus related topics: Antioxidants Dietary Supplements Diets High Blood Pressure Obesity
U.S. FDA Resources
Study Type: Interventional
Study Design: Prevention, Randomized, Double-Blind, Placebo Control, Parallel Assignment, Efficacy Study
Official Title: Potential Health Benefits of Dietary Antioxidants From Supplements v. Foods

Further study details as provided by Stanford University:

Primary Outcome Measures:
  • Inflammatory markers

Secondary Outcome Measures:
  • Serum lipids
  • Blood pressure

Estimated Enrollment: 90
Study Start Date: March 2007
Estimated Study Completion Date: December 2008
Detailed Description:

Increasing the amount of antioxidants in your diet is thought to be one way to improve your health. If antioxidants do have a beneficial effect, one way to measure that is to examine possible changes in the levels of "inflammatory markers" in your blood.

Participants will be asked to consume an antioxidant supplements that may or may not include Vitamin E, Vitamin C, Beta-carotene, and Selenium or a placebo for 8 weeks. The doses of antioxidants will be similar to the amounts suggested by the United States Department of Agriculture's (USDA) recommended daily allowances (RDA). In addition, a group of participants will be asked to change their usual eating habits and consume more of certain foods that are naturally good sources of the four antioxidants contained in the pills.

Eligible participants will be asked to come to the Stanford Campus for 3 fasting blood draws over the period of 8 weeks and to complete diet and physical activity questionnaires at the beginning, middle and end of the study period.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

Overweight/obesity; high LDL cholesterol, pre-hypertension.

Exclusion Criteria:

  1. Daily intake of > 5 servings of vegetables and fruits
  2. Fasting blood glucose >140 mg/dL
  3. BMI >40
  4. Liver or renal disease; Atherosclerosis (e.g., CAD, PAD); Malignant neoplasm; Ongoing infection; Inflammatory disease
  5. Currently taking the following medications:

    Anti-inflammatory drugs Lipid lowering drugs Anti-hypertensive drugs Calcium containing drugs Drugs known to affect blood coagulation Drugs known to affect antioxidant status

  6. Pregnant or lactating
  7. Inability to communicate effectively with study staff
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00756405

Locations
United States, California
Stanford University School of Medicine
Stanford, California, United States, 94305
Sponsors and Collaborators
Stanford University
Investigators
Principal Investigator: Christopher D Gardner Stanford University
  More Information

No publications provided

Responsible Party: Stanford University ( Christopher D Gardner, Principal Investigator )
Study ID Numbers: SU-08202008-1284, 7116
Study First Received: September 19, 2008
Last Updated: December 8, 2008
ClinicalTrials.gov Identifier: NCT00756405     History of Changes
Health Authority: United States: Institutional Review Board

Study placed in the following topic categories:
Obesity
Antioxidants
Hyperlipidemias
Metabolic Diseases
Vascular Diseases
Overweight
Body Weight
Signs and Symptoms
Hyperinsulinism
Nutrition Disorders
Overnutrition
Insulin Resistance
Glucose Metabolism Disorders
Metabolic Disorder
Dyslipidemias
Hypertension
Lipid Metabolism Disorders

Additional relevant MeSH terms:
Obesity
Antioxidants
Hyperlipidemias
Metabolic Diseases
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Vascular Diseases
Overweight
Protective Agents
Pharmacologic Actions
Body Weight
Signs and Symptoms
Hyperinsulinism
Nutrition Disorders
Cardiovascular Diseases
Overnutrition
Insulin Resistance
Glucose Metabolism Disorders
Dyslipidemias
Hypertension
Lipid Metabolism Disorders

ClinicalTrials.gov processed this record on May 07, 2009