NCT00756405

Effects of Dietary Antioxidants on Cardiovascular Risk Factors

Potential Health Benefits of Dietary Antioxidants From Supplements v. Foods

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 88 (actual)
• Sponsor: Christopher Gardner · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

The aim of the Antioxidant Study was 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.

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 were asked to consume an antioxidant supplement including carotenoids, mixed tocopherols, vitamin C 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 (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 were 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.

Conditions

• Obesity
• Hyperlipidemia
• Hypertension

Interventions

Type	Name	Description
BEHAVIORAL	Antioxidant diet	Participants were asked to increase antioxidant-rich food intake to approximately double their daily habitual intake and take a placebo pill.
DIETARY_SUPPLEMENT	Antioxidant supplement	Participants were asked to consume their usual diet and take a supplement containing carotenoids, mixed tocopherols, vitamin C and selenium, designed to approximately double their daily habitual intake.
DIETARY_SUPPLEMENT	Placebo	Participants were asked to consume their usual diet and take a placebo pill.

Timeline

• Start date: 2007-03-01
• Primary completion: 2008-12-01
• Completion: 2008-12-01
• First posted: 2008-09-22
• Last updated: 2023-02-22

Locations

1 site across 1 country: United States