Vitamin A Equivalence of Plant Carotenoids in Children
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|ClinicalTrials.gov Identifier: NCT00680212|
Recruitment Status : Completed
First Posted : May 20, 2008
Last Update Posted : February 18, 2009
|Condition or disease||Intervention/treatment||Phase|
|Vitamin A Deficiency||Dietary Supplement: dietary carotenoids Dietary Supplement: spinach, rice, and synthetic beta-carotene||Phase 2|
This project is to determine the vitamin A value (equivalence) of dietary provitamin A carotenes from spinach, Golden Rice, and pure ß-carotene (ß-C) in oil. These experiments will be conducted in children (ages 6-8) with/without adequate (marginal deficiency) vitamin A nutrition. As plant provitamin A carotenoids are a major and safe vitamin A source for a vast population in the world, it is essential to determine the efficiency of provitamin A carotenoid (mainly ß-C) conversion to vitamin A. By introducing ß-C into rice endosperm, Golden Rice may directly benefit consumers by providing vitamin A nutrition. Our investigation uses hydroponically grown, deca-deuterium labeled spinach and Golden Rice, synthetic ß-C-d10 and a vitamin A isotope reference, C13 labeled retinyl acetate (13C10-RAc), to evaluate the bioavailability and the bioconversion of plant provitamin A carotenes to retinol as compared with ß-C in oil capsules in vivo.
Seventy-two children each will take two meals, breakfast containing 13C10-RAc dose (0.5mg in 0.2g oil capsule) and lunch containing spinach containing 1 mg ß-C (along with white rice), or Golden Rice containing 0.5mg ß-C (along with light colored vegetables), or ß-C oil capsules containing 0.5 mg ß-C in 0.2g oil (along with white rice and light colored vegetables) on the first day of the study. Blood samples will be collected at 1 3, 7, 14, and 21 days after the study doses.
The enrichment of labeled ß-C and labeled retinol in human circulation will be determined using advanced liquid chromatography / mass spectrometry and gas chromatography / mass spectrometry. Through the applications of these novel technologies, we will be able to determine the relative biological activities of endogenous carotenoids; that is, the vitamin A value of spinach, Golden Rice, and ß-C in oil capsules for children with/without vitamin A malnutrition.
This study will be of importance in planning vitamin A deficiency prevention strategies and also will provide useful information regarding the potential efficacy of a bioengineered crop to provide vitamin A nutrition.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||72 participants|
|Intervention Model:||Factorial Assignment|
|Masking:||None (Open Label)|
|Primary Purpose:||Basic Science|
|Official Title:||Phase 2 Study of VITAMIN A EQUIVALENCE OF PLANT CAROTENOIDS IN CHILDREN|
|Study Start Date :||July 2008|
|Actual Primary Completion Date :||January 2009|
|Actual Study Completion Date :||January 2009|
Dietary Supplement: dietary carotenoids
spinach containing 1 - 2 mg beta-carotene rice containing 0.5 mg beta-carotene synthetic beta-carotene 0.5 mg oil capsule
Dietary Supplement: spinach, rice, and synthetic beta-carotene
spinach containing 1 - 2 mg beta-carotene rice containing 0.5 mg beta-carotene synthetic beta-carotene, 0.5 mg oil dose
Other Name: dietary carotenoids
- conversion efficiency of b-C to retinol [ Time Frame: up to 21 days ]
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 ClinicalTrials.gov identifier (NCT number): NCT00680212
|United States, Massachusetts|
|USDA Human Nutrition Research Center on Aging, Tufts Uni.|
|Boston, Massachusetts, United States, 02111|
|Principal Investigator:||Guangwen Tang, Ph. D||Tufts University|