- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00959790
Vegetable Consumption in Relation to Health (8374)
Beneficial Effects of Vegetable Consumption and a Diet Intervention on Health in Lean and Obese Men.
Rationale: Consumption of vegetables is generally considered to be associated with several positive effects on health. Vegetables are a heterogeneous group of our diet which is rich in bio-actives. The vegetables contain a range of vitamins, minerals, dietary fibres and phytochemicals like potassium, flavonoids, carotenoids, and vitamin C. The recommended intake of vegetables by the Dutch Health Council is 200 grams daily (Health Council, 2006).
Health in this project is defined as the possibility of a subject to change and adapt easily in response to a certain challenge. Healthy subjects show resilience in different physiological processes related to oxidative stress, metabolic stress, neurological stress and inflammatory stress. The reaction/response to a challenge might be changed when subjects have consumed more or less vegetables and have an improved health status. The response might also differentiate between subjects differing in BMI (healthy weight versus overweight/obese). Supplementation of vegetables will be provided in two conditions: a low and a high daily intake (50 versus 200 grams daily). An intervention known to have positive effects on health is weight loss. This will be studied in relation to health (the reaction to the challenge test) as well.
A beneficial effect is present when 5% improvement of health markers is shown with vegetable supplementation, similar as is known from weight loss studies.
Objective: The primary objective of the present study is to set-up a methodology to investigate health based on the resilience to challenge. A secondary objective is the effectiveness of the challenge concept with a food intervention. The vegetable supplementation study is a first example to test the challenge concept. Therefore, vegetable consumption according to the recommendations of the Dutch Health Council of 200 grams of vegetables daily will be studied with an exercise challenge test, to investigate the beneficial 'health' effects.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Study design: The study is designed as a randomized, cross-over and parallel, open study.
Study population: The number of subjects participating in the study will be 32, healthy, lean and obese men, aged between 18-45 years.
Intervention: each intervention lasts four weeks:
- High Vegetable treatment: consumption of 200 grams of vegetables daily;
- Low Vegetable treatment: consumption of 50 grams of vegetables daily;
- An energy restricted diet intervention with the habitual vegetable consumption.
Main study parameters/endpoints: A 'challenge test' will be used as a physical stress test to examine whether subjects show more or less resilience to the test. The reaction and recovery of the human system to the exercise test may be used as indicators of health status on different biological analyses (transcriptomics; metabolomics; rules based medicine pm). Different analyses to measure oxidative stress will be performed. Also standard health biomarkers will be determined to examine the intervention effects.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Utrecht
-
Zeist, Utrecht, Netherlands, 3700 AJ
- TNO Quality of Life, Metabolic ward
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
Healthy as assessed by the
- health and lifestyle questionnaire, (P8374 F02; in Dutch)
- physical examination
- results of the pre-study laboratory tests
- Males aged between 18 and 45 years at Day 01 of the study
- Body Mass Index (BMI): for the lean : between 20 and 25 kg/m2; obese between 30 and 35 kg/m2
- Normal Dutch eating habits as assessed by P8374 F02
- Used to consume vegetables daily and liking vegetables (P8374 F02 and F06)
- Physically able to perform a maximal cycling exercise test
- Voluntary participation
- Having given written informed consent
- Willing to comply with the study procedures
- Appropriate veins for blood sampling according to TNO
- Willing to accept use of all nameless data, including publication, and the confidential use and storage of all data for at least 15 years
- Willing to accept the disclosure of the financial benefit of participation in the study to the authorities concerned.
Exclusion Criteria:
- Participation in any clinical trial including blood sampling and/or administration of substances up to 90 days before Day 01 of this study
- Participation in any non-invasive clinical trial up to 30 days before Day 01 of this study, including no blood sampling and/or oral, intravenous, or inhalatory administration of substances
- Having a history of medical or surgical events that may significantly affect the study outcome, including cardiovascular disease or hypertension and/or (food) allergy
- Using prescribed medication or taking pain killers on a regular basis (judged by the medical investigator) ;
- Smoking
- Exercise regularly and exceed the Dutch Standard of Healthy Physical Activity of 2.5 hours/week
- Alcohol consumption > 28 units/week
- Reported unexplained weight loss or gain of > 2 kg in the month prior to the pre-study screening
- Reported slimming or medically prescribed diet
- Recent blood donation (<1 month prior to the start of the study)
- Not willing to give up blood donation during the study
- Personnel of TNO Quality of Life, their partner and their first and second degree relatives
- Not having a general practitioner
- Not willing to accept information-transfer concerning participation in the study, or information regarding his health, like laboratory results, findings at anamnesis or physical examination and eventual adverse events to and from his general practitioner.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: High vegetable dose
Consumption of 200 grams of vegetables daily, for four weeks.
|
200 or 50 grams of vegetables daily for four weeks
|
Experimental: Low vegetable dose
Consumption of 50 grams of vegetables daily, for four weeks.
|
200 or 50 grams of vegetables daily for four weeks
|
Active Comparator: Weight loss interventio
Consumption of - 1000 kcal daily, for four weeks to be used as a positive control for the vegetables interventions.
|
Consume about 1000 kcal less daily, for four weeks, as a positive control to the vegetables interventions.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Investigate whether the maximal exercise performance test is a good concept for a challenge test, to examine 'health'. Health is defined as the ability to adapt in different circumstances.
Time Frame: after 4 weeks intervention
|
after 4 weeks intervention
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Compare outcomes on the exercise test after high or low vegetable consumption and after weight loss. Differences are expected between the lean and obese subjects.
Time Frame: after four weeks of intervention
|
after four weeks of intervention
|
Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Principal Investigator: Wilrike Pasman, PhD, TNO
- Study Director: Ineke Klöpping-Ketelaars, PhD, MD, TNO
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- P8374
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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