Iron biology in immune function, muscle metabolism and neuronal functioning

Area of Science:

• Nutritional Science
• Human Physiology
• Biochemistry

Background:

• Global iron deficiency prevalence suggests significant health impacts.
• Existing understanding of iron's role in physiological, biochemical, and neurological outcomes requires re-evaluation.

Purpose of the Study:

• To reconsider the established links between iron status and various health outcomes.
• To focus on the biological mechanisms underlying iron deficiency's effects on the immune system, neural function, and energy metabolism.
• To identify knowledge gaps in basic iron biology and its dependent processes.

Main Methods:

• Literature review focusing on biological processes affected by iron status.
• Assessment of the evidence strength for iron's role in immune, neural, and metabolic functions.
• Identification of gaps in the understanding of iron-dependent biological pathways.

Main Results:

• Iron is essential but can be toxic, necessitating complex regulation.
• Significant gaps exist in the basic biological understanding of iron's functions and regulation.
• Evidence strength varies across domains of immune, neural, and metabolic health.

Conclusions:

• A deeper understanding of iron's basic biology is crucial.
• This review sets the foundation for future research on iron deficiency's impact on health and population functioning.
• Further investigation is needed to fully elucidate iron's complex role in human health.