Vitamin A Value of Spirulina Carotenoids in Humans

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

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Recruitment Status

COMPLETED

Clinical Phase

PHASE1/PHASE2

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2004-04-30

Study Completion Date

2008-12-31

Brief Summary

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The goal of this protocol is to determine the vitamin A value (equivalence) of spirulina. The investigation will use intrinsically deuterium labeled spirulina and an isotope vitamin A reference dose, 13C10- retinyl acetate (13C10 RAc), in males (n=20). Up to 45 blood samples (10 ml/sample) will be collected from each subject over a two-month period to evaluate the bioavailability and bioconversion of spirulina ß-carotene to vitamin A.

Detailed Description

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By utilizing novel stable isotope dilution techniques recently developed in our laboratory, we will trace deuterium labeled ß-carotene in intrinsically labeled spirulina, which is harvested from a hydroponic system. In the mean time, we will track 13C10 labeled vitamin A in humans. In this way we will determine absorption of ß-carotene from spirulina matrix and the conversion of the spirulina ß-Carotene to retinol. This will enable us quantitatively determine the vitamin A equivalence of spirulina.

The specific aims of this study are:

1. To determine labeled ß-C blood response kinetics following an acute dose of intrinsically labeled spirulina;
2. To determine labeled retinol blood response from the intrinsically labeled spirulina;
3. To determine 13C10 retinol blood response from the isotope reference material 13C10 retinyl acetate;
4. To determine s spirulina-vitamin A equivalence.

Conditions

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Intrinsically Labeled Spirulina

Keywords

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spirulina carotenoids

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SINGLE_GROUP

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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