Related Experiment Video
Updated: Jan 28, 2026
The Isolation of Flowing Mesenteric Lymph in Mice to Quantify In Vivo Kinetics of Dietary Lipid Absorption and Chylomicron Secretion
Published on: November 30, 2022
Dietary iron absorption during early postnatal life
Sheridan L Helman1,2, Gregory J Anderson3,4,5, David M Frazer1,2,6
1Iron Metabolism Laboratory, QIMR Berghofer Medical Research Institute, 300 Herston Road, Herston, QLD, 4006, Australia.
Insights
Infant iron absorption is crucial for development. Breast milk enhances iron uptake in infants, but the exact mechanisms are not fully understood, necessitating further research into this vital process.
Area of Science:
- Nutritional Science
- Pediatric Gastroenterology
- Developmental Biology
Background:
- Inadequate iron during infancy can lead to irreversible cognitive and brain development issues.
- While maternal iron stores are vital post-natally, breast milk also significantly contributes to infant iron needs.
- Suckling infants exhibit a much higher efficiency in absorbing dietary iron compared to weaned individuals.
Purpose of the Study:
- To review the current understanding of enhanced intestinal iron absorption in suckling infants.
- To explore the potential roles of breast milk composition and gastrointestinal tract factors in infant iron uptake.
- To identify knowledge gaps and emphasize the need for further research into infant iron absorption mechanisms.
Main Methods:
- Literature review of existing studies on infant iron absorption.
- Analysis of the role of ferroportin and other iron absorption molecules.
- Discussion of the impact of breast milk iron content and distribution.
- Consideration of the contribution of distal gastrointestinal segments.
Main Results:
- Ferroportin is confirmed as essential for iron absorption in infants, similar to adults.
- The specific mechanisms driving enhanced iron absorption in suckling infants remain largely unclear.
- The role of other iron absorption molecules and the influence of breast milk characteristics require further investigation.
Conclusions:
- Enhanced iron absorption in suckling infants is critical for preventing long-term developmental deficits.
- Understanding the molecular and compositional factors influencing infant iron uptake is essential.
- Further research is imperative to elucidate the mechanisms of efficient infant intestinal iron absorption.
Abstract:
Inadequate iron levels during early life can have adverse consequences for the developing infant. Iron deficiency during this critical period of growth can affect brain development and cognitive function, problems that can be lifelong despite subsequent correction of the iron deficit. Therefore, it is critical that the suckling infant has sufficient iron for their developmental needs. Much of the iron used in the immediate post-natal period is stored iron that was acquired from the mother in the final trimester of pregnancy, however, despite having low iron levels, breast milk can also make a significant contribution to infant iron needs. This reflects the ability of the suckling infant to absorb dietary iron far more efficiently than is possible after weaning. The mechanisms underlying this enhanced iron absorption are poorly understood. The iron export protein ferroportin is essential for this process, as it is in adults, however, the role of other molecules normally involved in iron absorption following weaning is less clear. The composition and distribution of iron in breast milk may be important, as could the contribution of more distal parts of the gastrointestinal tract. This review discusses the potential role of each of the above components in intestinal iron absorption during suckling and highlights the need for further research into this important process.
Related Concept Videos
02:42Half-life of a Reaction
01:23Characteristics of Life
01:23Dietary Connections
02:39The Angiosperm Life Cycle
01:28Proteins: Dietary Sources and Requirements
01:19Drug Absorption: Factors Affecting GI Absorption