What Is Iron and Why Is It Important?

Iron is a key component of haemoglobin, the protein in red blood cells responsible for transporting oxygen throughout the body — including to the brain. It is also essential for:

• Neurotransmitter synthesis
• Myelin formation (the protective sheath around nerve fibres)
• Mitochondrial energy production

Both iron deficiency and iron overload can negatively affect brain health, making balance critical.

How Iron Supports Brain Health

Supports Oxygen Delivery to the Brain

The brain consumes a significant amount of oxygen to maintain cognitive function. Adequate iron levels help ensure efficient oxygen transport, supporting alertness, memory, and mental clarity.

Supports Neurotransmitter Production

Iron is required for the synthesis of key neurotransmitters such as dopamine, norepinephrine, and serotonin, which influence mood, motivation, focus, and emotional regulation.

Supports Myelin and Neural Communication

Iron plays a role in the formation and maintenance of myelin, which allows nerve signals to travel efficiently. Healthy myelination supports processing speed and coordination.

Supports Cognitive Development and Maintenance

Iron deficiency has been associated with impaired attention, memory, and learning. Adequate iron supports cognitive performance across the lifespan.

Iron and Traumatic Brain Injury (TBI)

TBI can disrupt cerebral blood flow, oxygen utilization, and metabolic processes in the brain. Iron status may influence recovery and long-term neurological function following injury.

Iron may support post-TBI brain health by:

• Supporting oxygen delivery to healing brain tissue
• Supporting neurotransmitter balance, which can be disrupted after injury
• Supporting energy metabolism at the cellular level

However, TBI can also alter iron regulation in the brain, and excessive iron accumulation has been associated with increased oxidative stress. For this reason, iron supplementation after TBI should always be guided by laboratory testing and medical supervision.

Iron and Chronic Traumatic Encephalopathy (CTE)

CTE is associated with chronic inflammation, oxidative stress, and progressive neurodegeneration following repeated head trauma. Research suggests abnormal iron accumulation in certain brain regions may contribute to oxidative damage and disease progression.

Maintaining appropriate iron balance — avoiding both deficiency and excess — is critical for long-term brain health. Rather than indiscriminate supplementation, careful assessment and nutritional balance are key strategies for individuals concerned about CTE.

Iron Balance and Oxidative Stress

While iron is essential, excess free iron can promote oxidative stress through the generation of free radicals. This makes iron regulation particularly important in neurological conditions where oxidative damage is already elevated.

Supporting iron balance through proper testing, diet, and medical guidance is essential for safe brain health support.

Dietary Sources of Iron

Iron is available in two forms:

• Heme iron (more easily absorbed): red meat, poultry, fish
• Non-heme iron: leafy greens, legumes, nuts, seeds, fortified grains

Vitamin C can enhance non-heme iron absorption, while certain compounds like phytates and tannins may reduce absorption.

Supplementation and Dosage Considerations

Iron supplements should only be used when deficiency is confirmed through blood testing. Dosage varies based on individual needs and iron status and should be determined by a healthcare professional.

Common supplemental forms include:

• Ferrous bisglycinate
• Ferrous sulfate
• Ferric iron complexes

Safety and Considerations

Iron supplementation without confirmed deficiency can be harmful. Excess iron may increase oxidative stress and contribute to neurological damage. Individuals with genetic conditions affecting iron metabolism or those managing neurological injuries should consult a healthcare professional before using iron supplements.

Study https://www.sciencedirect.com/science/article/abs/pii/S0149763425003732

Important Disclaimer

The information provided on this website is for educational and informational purposes only. None of the treatments, lifestyle changes, or supplements discussed are cures for CTE or any other neurodegenerative disease. At present, there is no known cure for these conditions.

We strongly encourage you to seek advice from a qualified medical professional, such as a doctor or specialist, before making any changes to your diet, beginning new treatments, or taking supplements. “Natural” does not always mean safe, and some substances may carry risks, side effects, or interactions with medications.

Our goal is to empower individuals with knowledge—not to replace professional medical care.