How Does Iron Deficiency Correlate with Autism-Related Behaviours?

PostedNovember 27, 2025

UpdatedNovember 27, 2025

ByMy Patient Advice

Author: Beatrice Holloway, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Emerging iron deficiency and autism research has shown that low iron levels may be linked to several behavioural features commonly observed in children with autism. Iron plays a critical role in brain development, neurotransmitter function, and energy regulation all of which influence mood, attention, and social behaviour.

Some studies have reported that children with autism tend to have lower ferritin levels, indicating insufficient iron stores in the body. This deficiency has been associated with challenges such as reduced attention span, increased sensory sensitivities, and heightened irritability. While not all children with autism are iron-deficient, those who are may show more pronounced difficulties in these areas, and in some cases, iron supplementation when guided by a professional has led to improved behavioural regulation and reduced restlessness.

How It Helps

Understanding how iron supports brain function can explain its link to autism behaviours:

Improved Focus

Adequate iron levels support dopamine production, which plays a role in attention and concentration.

Mood Regulation

Iron is involved in serotonin synthesis, potentially helping reduce emotional outbursts or anxiety in some children.

Better Sleep and Energy

Addressing iron deficiency may also improve sleep quality and daytime alertness, which supports better behaviour throughout the day.

If you’re curious about the latest in iron deficiency and autism research, visit providers like Autism Detect for personal consultations tailored to your child’s nutritional and behavioural needs.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to nutritional deficiencies.

Beatrice Holloway, MSc

Author

Beatrice Holloway is a clinical psychologist with a Master’s in Clinical Psychology and a BS in Applied Psychology. She specialises in CBT, psychological testing, and applied behaviour therapy, working with children with autism spectrum disorder (ASD), developmental delays, and learning disabilities, as well as adults with bipolar disorder, schizophrenia, anxiety, OCD, and substance use disorders. Holloway creates personalised treatment plans to support emotional regulation, social skills, and academic progress in children, and delivers evidence-based therapy to improve mental health and well-being across all ages.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.