Iron ferrous fumarate
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Iron Ferrous Fumarate: Efficacy, Absorption, and Applications
Introduction to Iron Ferrous Fumarate
Iron ferrous fumarate is a widely used iron supplement, particularly in the fortification of foods and treatment of iron deficiency anemia. It is favored for its good sensory properties and relatively high bioavailability compared to other iron compounds. This article synthesizes recent research on the bioavailability, efficacy, and practical applications of ferrous fumarate in various populations.
Bioavailability of Ferrous Fumarate vs. Ferrous Sulfate
Comparative Studies in Different Populations
Several studies have compared the bioavailability of ferrous fumarate to ferrous sulfate, a commonly used iron supplement. Research involving non-anemic Mexican women and children found no significant differences in iron absorption between ferrous fumarate and ferrous sulfate. The relative bioavailability (RBV) was 86% in women, 97% in infants, and 106% in young children, indicating that ferrous fumarate is as well absorbed as ferrous sulfate in these groups .
Impact of Juices on Iron Absorption
The absorption of ferrous fumarate can be influenced by the presence of certain juices. A study on small children demonstrated that orange juice, which contains ascorbic acid, significantly enhances the absorption of ferrous fumarate compared to apple juice, which lacks ascorbic acid. The absorption increased from 5.5% to 8.2% when ferrous fumarate was consumed with orange juice .
Efficacy in Treating Iron Deficiency Anemia
Pregnancy and Anemia Treatment
In pregnant women with iron deficiency anemia, intravenous iron sucrose was found to be more effective than oral ferrous fumarate in increasing hemoglobin and serum ferritin levels. The study reported a higher increase in hemoglobin (22 g/L vs. 12 g/L) and serum ferritin in the intravenous group compared to the oral group .
Infants and Young Children
Ferrous fumarate has been recommended for fortifying foods for infants and young children due to its good sensory properties and effectiveness in improving iron status. However, some studies suggest that iron-deficient infants may absorb iron from ferrous fumarate less efficiently than from ferrous sulfate, necessitating higher doses of ferrous fumarate in complementary foods 45.
Practical Applications and Delivery Methods
Fortification of Foods
Ferrous fumarate is used to fortify various foods, including infant cereals and complementary foods. Studies have shown that it can prevent iron deficiency as effectively as ferrous sulfate in iron-replete infants. However, for iron-deficient infants, higher doses of ferrous fumarate may be required to achieve similar efficacy 45.
Microencapsulated Iron Sprinkles
A novel approach to delivering iron is through microencapsulated ferrous fumarate sprinkles, which can be added to complementary foods. This method has shown similar efficacy to ferrous sulfate drops in treating anemia in infants, with the added benefit of better adherence due to fewer side effects 67. Additionally, iron absorption from these sprinkles is up-regulated in infants with iron deficiency anemia, ensuring adequate iron intake .
Conclusion
Ferrous fumarate is a viable iron supplement for various populations, including non-anemic women, infants, and young children. It is as effective as ferrous sulfate in many cases and can be enhanced with ascorbic acid-rich juices like orange juice. While intravenous iron sucrose may be more effective in certain conditions like pregnancy-related anemia, ferrous fumarate remains a practical choice for food fortification and innovative delivery methods like microencapsulated sprinkles. Further research is needed to optimize its use in treating iron deficiency, particularly in iron-deficient infants.
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