Expired Study
This study is not currently recruiting Study Participants on ClinicalConnection.com. If you would like to find active studies please search for clinical trials.

Boston, Massachusetts 02111


Purpose:

This investigation protocol uses an isotope reference method to evaluate bioavailability of ß-C in rice and its bioconversion to vitamin A. A well-nourished population will be fed hydroponically grown Golden Rice containing ~ 1 mg of β-carotene at day 8 after a reference dose of vitamin A at day 1. The blood samples will be collected up to 33 days after the doses. The absorption kinetics will be determined by tracking both vitamin A and β-carotene in human serum. Blood responses to Golden Rice β-carotene will be determined and evaluated. The vitamin A value of Golden Rice can thus be quantitatively determined.


Study summary:

Recently, scientists have genetically engineered "golden rice" that contains 1.6 ug ß-carotene in a gram of dry rice (12). Since the vitamin A equivalency varies from 2 ug (oil dose) to 27 ug (vegetable) carotene to 1 retinol equivalent and the equivalency is matrix dependent, it is necessary to know what the vitamin A equivalency of golden rice beta-carotene is. The determination of the absorption and conversion of golden rice beta-carotene is of importance for designing food programs in many rice-eating regions of the world, where vitamin A deficiency is common. To evaluate the absorption and intestinal conversion of rice beta-carotene after an acute dose of golden rice, an intrinsically labeled Golden Rice with a labeled reference dose of vitamin A are used. We propose to conduct a pilot study on the US adults with normal vitamin A status (n = 15). The specific aims of this pilot study are: 1. To determine ß-carotene response kinetics following a meal of golden rice with 0, 5, or 10 g fat (butter); 2. To determine retinol kinetics from the golden rice and from the labeled vitamin A dose; 3. To determine vitamin A value of golden rice ß-carotene in adults with normal vitamin A status. The determination of the absorption and conversion of golden rice ß-carotene is of importance for designing food programs in many rice-eating regions of the world, where vitamin A deficiency is common.


Criteria:

Inclusion Criteria: - healthy health Exclusion Criteria: - GI track problems


NCT ID:

NCT00680355


Primary Contact:

Principal Investigator
Guangwen Tang, Ph. D
Tufts University


Backup Contact:

N/A


Location Contact:

Boston, Massachusetts 02111
United States



There is no listed contact information for this specific location.

Site Status: N/A


Data Source: ClinicalTrials.gov

Date Processed: January 16, 2018

Modifications to this listing: Only selected fields are shown, please use the link below to view all information about this clinical trial.


Click to view Full Listing

This study is not currently recruiting Study Participants on ClinicalConnection.com. The form below is not enabled.