The Effect of Lactobacillus Cultures on Iron Bioavailability.

Not Applicable

Completed

• Conditions: Low Iron Stores
• Interventions: Behavioral: Active Lactobacillus plantarum 299v; Dietary Supplement: Inactive Lactobacillus plantarum 299v

• Registration Number: NCT00283491
• Lead Sponsor: University of Copenhagen

Brief Summary

The purpose of this study is to determine the effect of a lactic acid fermented oat gruel on iron absorption in the upper and lower part of the intestine, respectively.

Detailed Description

Iron deficiency and low iron stores are prevalent in infants, adolescents, and women of childbearing age in both Western and developing countries. One cause of iron deficiency is the low iron bioavailability from foods, which is partly due to inhibiting factors in the diet, such as phytate and phenolic compounds. A number of single meal studies with lactic acid fermented vegetables and cereals have shown a significant increase in iron absorption in humans. This is believed to be caused mainly by the lactic acid produced during the fermentation process, which conteracts the inhibiting effect of phytate.

A recent study of ours indicate that the increased nonheme iron absorption from a low iron bioavailability meal was due not only to an effect of the lactic acid produced, but also a specific effect of the lactic acid bacteria. As lactic acid bacteria colonizes the entire intestine but mainly the colon it is of interest to determine whether these bacteria can increase iron absorption from the distal part of the intestine since iron absorption normally is believed to be absorbed from the duodenum and most proximal small intestine.

The purpose of this study is therefore to determine the the effect of Lactobacillus plantarum 299v in a lactic acid fermented oat gruel on iron absorption in the proximal and distal small intestine, respectively, in a cross-over design with 18 healthy women of childbearing age, served both fermented oat gruel and pasteurized, fermented oat gruel.

Study Timeline

• Status Verified: 2005-10
• Study Start: 2005-10
• Study Completion: 2005-11
• Study First Submitted: 2006-01-27
• Study First Submitted QC: 2006-01-27
• Study First Posted: 2006-01-30
• Last Update Submitted: 2009-01-20
• Last Update Posted: 2009-01-21

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 18

Inclusion Criteria

• serum ferritin in the range 12-30 µg/L
• hemoglobin > 110 g/L

Exclusion Criteria

• pregnant or lactating
• smoker
• intake of vitamin-, mineral- or other dietary supplements during the study and 2 mo before start
• sports practicing >10h/week
• blood donation during the study and 2 mo before start
• medication
• participation in other isotope studies

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
A	Active Lactobacillus plantarum 299v	-
B	Inactive Lactobacillus plantarum 299v	-

Primary Outcome Measures

Name	Time	Method
Concentrations of 55-Fe and 59-Fe in blood 18 days after intake in first and second period, respectively (i.e. november and december 2005).	2 mo

Secondary Outcome Measures

Name	Time	Method
Measurement of serum-ferritin and transferrin receptor in the blood samples before and after each period.	2 mo

Trial Locations

Locations (1)

Department of Human Nutrition, The Royal Veterinary and Agricultural University; 🇩🇰 Frederiksberg C, Denmark