{
  "id": 15405898,
  "title": "Brain iron levels in children with ADHD may depend on when they start medication",
  "url": "https://urgent.news/2026/10/18/brain-iron-levels-in-children-with-adhd-may-depend-on-when-they-start",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-10-18T12:00:23.000Z",
  "source": {
    "name": "PsyPost",
    "slug": "psypost",
    "url": "https://www.psypost.org/brain-iron-levels-in-children-with-adhd-may-depend-on-when-they-start-medication/"
  },
  "original_language": "en",
  "account": "A new study published in Brain Research suggests that the age at which children with attention deficit hyperactivity disorder (ADHD) begin taking stimulant medications may impact the levels of iron in their brains. Researchers from the Child and Adolescent Health Service in Perth, Australia, analyzed brain imaging data from children with ADHD who started medication treatment by age eight and those who started at age nine or later. The study, using brain imaging data from the Oregon ADHD-1000 dataset, found that children who began treatment earlier had higher iron concentrations in several dopamine-rich brain regions compared to those who started later. Iron is essential for the production of dopamine, a chemical messenger that regulates movement, attention, and reward. The study, which tracked iron levels over a two-year period, found no significant difference in iron levels in the substantia nigra, thalamus, and most of the basal ganglia between the two groups. However, children with ADHD who started medication at a younger age had lower iron content in the globus pallidus, a key part of the basal ganglia involved in regulating dopamine circuitry and reward behaviors. The researchers noted that a shorter average duration of medication exposure in their study may explain this finding. They also discovered that the age at which a child began treatment had a more significant impact on iron levels in other brain regions. Children who started medication at age eight or younger had higher iron content in the thalamus, caudate nucleus, putamen, and globus pallidus compared to those who started at age nine or older. The researchers proposed that starting medication earlier in childhood may coincide with a period of rapid developmental changes in iron and dopamine levels, making the dopamine system more sensitive to external influences such as medication. The study has several limitations, including the relatively small sample size, which may affect the generalizability of the findings.",
  "summary": "Children with ADHD who begin taking stimulant medications at a younger age may develop higher brain iron levels than those starting later. A new study explores how treatment timing interacts with brain development in dopamine-rich regions.",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}