Iron Long-Term Labelling Study Benin

Study Overview
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Brief Summary
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Conventional indirect indicators of iron status, using serum and red blood cell biomarkers, are confounded by inflammation from common infections in sub-Saharan Africa, a region with a high prevalence of iron deficiency, making the assessment of iron balance and efficiency of iron intervention difficult. A potential reference method to quantify iron absorption and requirements using isotope dilution measurements in women living in areas with high burden of infection should be developed and validated within this project. The new method will allow accurate measurement of long term oral iron absorption and the estimation of iron requirements, potentially providing fundamental guidance for supplementation and fortification programs in sub-Saharan Africa. In a case series with four months' preventative iron supplementation intervention imbedded between a four months' control period prior intervention and a four months' control period after intervention, we will follow a group of 63 women. During the intervention period, the women will receive 50 mg Fe as ferrous sulfate tablets every day for 120 d. In total, the women will give 9 blood samples (day 1, 60 120, 150, 180, 210, 240, 300 and 360) for the de-termination of the isotopic composition and iron status biomarkers and 5 stool samples (day 1, 120, 180, 240 and 360) for the detection of soil transmitted helminths and gut inflammation. This design will allow the measurement of the isotopic iron dilution to assess the total oral iron absorption during the intervention period in comparison with the control periods without the administration of additional iron isotopes.

Official Title
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The Evaluation of Iron Supplementation and Iron Requirements Using a Novel Isotope Dilution Method in Beninese Women

Conditions
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Iron Absorption

Intervention / Treatment
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* Other: Eisensulfat LOMAPHARM 50 mg


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria Have participated in one of the original absorption studies Signed written informed consent to participate in the study Exclusion Criteria Long-term medication [except contraceptives] Any severe metabolic, gastrointestinal kidney or chronic disease such as diabetes, hepatitis, hypertension, cancer or cardiovascular diseases according to the participants own statement or examination of study doctor Blood losses [surgery, accident], donations or transfusions during the past 4 months before study start. Residence too far away [1 hour or more by motorbike] from study locations; Natitingou or Cotonou

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 50 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Oral Iron Supplementation<br>Eisensulfat LOMAPHARM 50 mg administration for 120 days | Other: Eisensulfat LOMAPHARM 50 mg<br>* Eisensulfat LOMAPHARM 50 mg administration for 120 days<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| iron isotope composition in blood |  | 1 year |