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The STOVITA Study - Bioefficacy of Beta-Carotene in Oil and in a Mixed Diet in Ileostomy Patients

Healthy Clinical Trial

Official title:
Bioefficacy and Bioavailability of Beta-Carotene in Oil and in a Mixed Diet in Ileostomy Patients Measuring Using Specifically 13C-Labelled Beta-Carotene and Retinol

Clinical Trial Summary

A controlled dietary intervention study will be carried out based on the stable isotope method the investigators have developed to quantify both the absorption of beta-carotene and its bioconversion to retinol in oil and in a mixed diet. For 4 weeks the participants will consume 2 capsules/day, 7 days/week with each capsule containing 100-mg [13C10] beta-carotene and 100-mg [13C10] retinyl palmitate. For two weeks they will consume a diet with high levels of beta-carotene in vegetables and fruits and for the other 2 weeks they will consume a diet with low levels of beta-carotene in vegetables and fruits supplemented with an extra amount of beta-carotene in oil. Samples of blood and faeces will be taken. The study hypothesis is that the absorption of beta-carotene in oil in comparison with the absorption of beta-carotene in a mixed diet differs by a factor of 3 to 6. The investigators want to measure the influence of the food matrix of vegetables and fruits on the absorption of beta-carotene in ileostomy patients on a western diet.

Clinical Trial Description

n/a

Study Design

Allocation: Randomized, Endpoint Classification: Bio-availability Study, Intervention Model: Crossover Assignment, Masking: Open Label, Primary Purpose: Prevention

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT00128804
Study type Interventional
Source Radboud University
Contact
Status Completed
Phase N/A
Start date July 2004
Completion date October 2004
View Details
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