Feeding the Rainbow to Investigate Endothelial Dysfunction

NCT ID: NCT01175577

Last Updated: 2012-02-03

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

COMPLETED

Clinical Phase

EARLY_PHASE1

Total Enrollment

60 participants

Study Classification

INTERVENTIONAL

Study Start Date

2009-10-31

Study Completion Date

2011-08-31

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

The primary purpose of this study is to compare the change in blood carotene concentration between a food-based versus nutritional supplement-based intervention. This study will randomize up to 60 healthy volunteers to receive either carotenoid-enriched food; natural, mixed carotenoid supplementation; chlorophyll complex or placebo supplementation. Blood carotene levels will be measured before and after 28 days of supplementation. Preliminary data will also be collected on several biomarkers associated with vascular inflammation and endothelial dysfunction. These biomarkers will be measured before and during a fast food control meal at the beginning and end of the intervention period.

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Dietary Modification Cardiovascular Disease

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

TRIPLE

Participants Investigators Outcome Assessors

Study Groups

Review each arm or cohort in the study, along with the interventions and objectives associated with them.

Supplement 1

Group Type ACTIVE_COMPARATOR

Chlorophyll complex, Standard Process

Intervention Type DIETARY_SUPPLEMENT

One capsule, twice daily with meals for 28 days

Supplement 2

Group Type ACTIVE_COMPARATOR

Betatene, sold as "Full Spectrum Carotenoid Complex"

Intervention Type DIETARY_SUPPLEMENT

One capsule per day with meals for 28 days

Food-based Intervention

Group Type ACTIVE_COMPARATOR

Small carotenoid-rich meals

Intervention Type OTHER

Single carotenoid-enriched soup or salad serving eaten daily

Placebo

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type OTHER

Safflower oil-filled capsules, one twice daily with meals

Interventions

Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.

Chlorophyll complex, Standard Process

One capsule, twice daily with meals for 28 days

Intervention Type DIETARY_SUPPLEMENT

Betatene, sold as "Full Spectrum Carotenoid Complex"

One capsule per day with meals for 28 days

Intervention Type DIETARY_SUPPLEMENT

Small carotenoid-rich meals

Single carotenoid-enriched soup or salad serving eaten daily

Intervention Type OTHER

Placebo

Safflower oil-filled capsules, one twice daily with meals

Intervention Type OTHER

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

* adults aged 18-65

Exclusion Criteria

* willingness to be randomized
* willingness to complete multiple blood draws following fast food consumption on two occasions over 28 days


* children \<18 years
* current use of carotenoid supplements (not including typical multivitamins containing beta-carotene)
* current use of polyphenol supplements including green tea, resveratrol, pine bark extract, cocoa, and/or grape skin extract
* current use of aspirin, statins or regular (\>2 per week) use of NSAID medications
* current smoking or past smoking greater than 3 packs total or currently living with a smoker
* excessive alcohol intake (\> 3 drinks per day) or history of alcoholism
* known exposure to asbestos
* autoimmune disease
* hemachromatosis
* history of gallbladder disease including gall stones or gall bladder removal
* pre-diabetes, metabolic syndrome or diabetes (1 or 2)
* established cardiovascular disease (arrhythmia, heart failure, hypertension treatment or untreated stage II hypertension (≥160/90; stage II technically diastolic ≥100mmHg, will maintain diastolic cutoff of 90mmHg), past MI or stroke)
* renal or liver disease (viral hepatitis, non-alcoholic steatohepatitis "fatty liver")
* acute infection except viral colds
* residual injury/pain/limitation from trauma
* chronic musculoskeletal disorders including osteoarthritis requiring pain medications
* psychiatric disorders that would impair completion of research tasks
* allergies to supplied foods
* anyone on a medically-prescribed diet
* \>3.5 servings fruits/veggies per day
* inability to consume entire study Control meal w/in specified timeline (30 minutes)
* current pregnancy or breast feeding
* refusal to participate in blood draws following the control meal.
Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

Meet the organizations funding or collaborating on the study and learn about their roles.

University of Washington

OTHER

Sponsor Role collaborator

Bastyr University

OTHER

Sponsor Role lead

Responsible Party

Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.

Ryan David Bradley

Research Assistant Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

Learn about the lead researchers overseeing the trial and their institutional affiliations.

Ryan D Bradley, ND, MPH

Role: PRINCIPAL_INVESTIGATOR

Bastyr University

Locations

Explore where the study is taking place and check the recruitment status at each participating site.

Bastyr University Clinical Research Center

Kenmore, Washington, United States

Site Status

University of Washington Clinical Research Center

Seattle, Washington, United States

Site Status

Countries

Review the countries where the study has at least one active or historical site.

United States

Other Identifiers

Review additional registry numbers or institutional identifiers associated with this trial.

SP

Identifier Type: -

Identifier Source: org_study_id

More Related Trials

Additional clinical trials that may be relevant based on similarity analysis.

Vitamin A Value of Spirulina Carotenoids in Humans
NCT00680277 COMPLETED PHASE1/PHASE2
GPR146 and Cholesterol Metabolism
NCT07142317 NOT_YET_RECRUITING NA