Cobalamin Absorption From Fortified Food (FL-72)

October 21, 2013 updated by: USDA, Western Human Nutrition Research Center

Cobalamin Absorption From Fortified Food in Older Adults With and Without Proton Pump Inhibitor Induced Achlorhydria

To determine B12 bioavailability from 14C-B12 fortified bread in healthy subjects and in subjects with proton pump inhibitor induced achlorhydria.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Cobalamin (vitamin B12) deficiency is highly prevalent in the US and worldwide. Deficiency is most common in the elderly, with an average prevalence ≈25% over age 60 y. About 40% of older persons with low serum cobalamin have food cobalamin malabsorption (F-CM), in which gastric atrophy/achlorhydria and/or dysfunction is implicated. Because of the prevalence of deficiency in those over age 60 y, it is generally recommended that the elderly consume a higher proportion of their cobalamin from fortified foods than what is recommended for younger people. However there is considerable debate about whether crystalline cobalamin is absorbed as well by the elderly with F-CM as it is by younger people, especially if it is added as a fortificant to food. The data to be collected in this study will provide information useful to on-going deliberations concerning the future fortification of wheat flour with vitamin B12 in the United States.

Study Type

Interventional

Enrollment (Actual)

6

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Davis, California, United States, 95616
        • Western Human Nutrition Center, University of California Davis

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

60 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • good overall health
  • normal absorptive capacity (controls) or with a serum B12 <300 pg/mL and a pepsinogen I level >100 μg/L (ACs).
  • All subjects must be available to complete the protocol

Exclusion Criteria:

  • Any chronic health disorder
  • Anemia of any kind
  • Renal insufficiency
  • excessive alcohol consumption
  • Prior GI surgery
  • Use of OTC or prescription drugs that interfere with B-12 absorption or metabolism
  • Use of vitamin supplements
  • Pregnancy or lactation

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Non-Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Fortified Bread
A single serving of 14C-B12 fortified bread
Other: 14C-B12 fortified bread
A single serving of 14C-B12 fortified bread

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
B12 bioavailability
Time Frame: 8 Days
B12 bioavailability from 14C-B12 fortified bread
8 Days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

USDA, Western Human Nutrition Research Center

Investigators

  • Principal Investigator: Lindsay Allen, PhD, WHNRC, ARS, University of California Davis

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

January 1, 2010

Primary Completion (Actual)

September 1, 2013

Study Completion (Actual)

September 1, 2013

Study Registration Dates

First Submitted

July 19, 2011

First Submitted That Met QC Criteria

July 19, 2011

First Posted (Estimate)

July 21, 2011

Study Record Updates

Last Update Posted (Estimate)

October 22, 2013

Last Update Submitted That Met QC Criteria

October 21, 2013

Last Verified

October 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • WHNRC 242621-1

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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