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Iron deficiency in infancy: current insights
Staffan K Berglund1,2, Magnus Domellöf1
1Department of Clinical Sciences, Pediatrics.
Insights
Iron deficiency in infants poses risks to neurodevelopment. Recent studies support delayed cord clamping and targeted iron supplementation, while emphasizing exclusive breastfeeding for the first six months.
Area of Science:
- Pediatrics
- Nutritional Science
- Developmental Biology
Background:
- Iron deficiency is the most prevalent micronutrient deficiency globally, with infants being a particularly vulnerable population.
- Infant iron homeostasis regulation mechanisms differ from adults, impacting neurodevelopmental outcomes.
- Both iron deficiency and overload can lead to adverse effects, including impaired neurodevelopment and gastrointestinal issues.
Purpose of the Study:
- To review recent research on infant iron metabolism.
- To evaluate the risks and benefits of iron supplementation in diverse infant populations.
- To inform optimal iron management strategies for infants.
Main Methods:
- Systematic review of recent scientific literature.
- Analysis of studies on infant iron homeostasis.
- Evaluation of clinical trials and observational studies on iron supplementation and cord clamping practices.
Main Results:
- Delayed cord clamping and targeted iron supplementation in at-risk infants show benefits.
- Maternal iron supplementation during pregnancy has limited impact on infant iron status and neurodevelopment.
- Exclusive breastfeeding for six months is safe for normal birth weight infants, followed by an iron-rich diet.
Conclusions:
- Optimizing iron interventions for infants is crucial for global health.
- Further research is needed on long-term outcomes, especially for low birth weight infants.
- Optimal iron fortification levels in infant formula require continued investigation.
Purpose Of Review:
Iron deficiency is the most common micronutrient deficiency and infants are at particular risk. The purpose of this review is to summarize recent studies that explored the metabolism of iron in infants as well as the risks and benefits of iron supplementation in different populations.
Recent Findings:
The ability of infants to regulate iron homeostasis is not fully known but most likely different from adults. Reducing iron deficiency has beneficial effects on neurodevelopment but iron overload may have adverse functional effects including diarrhea and even poor neurodevelopment. Recent studies have confirmed benefits of delayed cord clamping and supplementation of infants in risk groups while iron supplementation to pregnant women has shown limited effect in the offspring with regard to iron status and neurodevelopment. Further support is given to the recommendation that exclusive breast feeding, without supplementation, is safe for normal birth weight infants until 6 months whereafter an iron-rich diet should be given.
Summary:
Iron deficiency negatively impacts global health but efforts to identify optimal interventions are progressing. Yet, questions remain, particularly regarding long-term risks, benefits and optimal interventions for low birth weight infants as well as the level of iron fortification in infant formula.
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