18/09/2025
Iron doesn’t treat ADHD…unless you’re deficient.
A new meta-analysis (Neuroscience & Biobehavioral Reviews, 2025) reviewed 18 studies on iron supplements in children, teens, and menstruating adults without anaemia, including people with ADHD.
The findings?
Iron did NOT improve ADHD symptoms, attention, or depression in randomised trials.
But it did help with fatigue, anxiety, and memory… but only in people with iron deficiency (low ferritin).
Iron deficiency is common in people who menstruate or are still growing. It can look like ADHD:
– Brain fog
– Restlessness
– Poor concentration
– Tired-but-wired energy crashes
But if your iron is normal, iron supplements won’t help. You’ll just have expensive p*e.
Talk to your GP about ferritin testing (not just hemoglobin) before trying supplements.
Study DOI: 1Fiani, D., Chahine, S., Zaboube, M., Solmi, M., Powers, J. M., & Calarge, C. (2025). Psychiatric and cognitive outcomes of iron supplementation in non-anemic children, adolescents, and menstruating adults: a meta-analysis and systematic review. Neuroscience and biobehavioral reviews, 106372.