Hair Samples Predict Mental Health Risks in Children
- Children living with chronic illnesses experience heightened stress levels, and a new study suggests that measuring cortisol-the "stress hormone"-in hair samples could help doctors identify those most vulnerable...
- The study, published september 17, 2025, in the journal Psychoneuroendocrinology, involved 244 Canadian children diagnosed with chronic physical illnesses, including diabetes, arthritis, and cystic fibrosis.
- Unlike blood tests, which provide a snapshot of cortisol levels at a specific moment, hair analysis offers a retrospective measure of cortisol exposure over a longer period-typically months.
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Hair Analysis May Predict Mental Health in Chronically Ill Children
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Children living with chronic illnesses experience heightened stress levels, and a new study suggests that measuring cortisol-the “stress hormone”-in hair samples could help doctors identify those most vulnerable to developing mental health issues. Researchers found a correlation between cortisol levels in hair and the worsening of mental health symptoms in children with long-term physical conditions.
The study, published september 17, 2025, in the journal Psychoneuroendocrinology, involved 244 Canadian children diagnosed with chronic physical illnesses, including diabetes, arthritis, and cystic fibrosis. Researchers analyzed hair samples collected from the participants to measure cortisol levels over a period of several months.They then compared these levels to reports of mental health symptoms, such as anxiety and depression, provided by the children and their parents.
How Cortisol in Hair Reveals stress
Unlike blood tests, which provide a snapshot of cortisol levels at a specific moment, hair analysis offers a retrospective measure of cortisol exposure over a longer period-typically months. This provides a more extensive picture of a child’s chronic stress levels. The study found that higher cortisol levels in hair were associated with increased mental health symptoms over time.
“This is a really exciting development as it offers a non-invasive and relatively inexpensive way to assess chronic stress in children who might potentially be struggling,” explains Dr. Sarah jones,lead author of the study and a researcher at the children’s Hospital of Eastern Ontario in Ottawa. “Early detection is key when it comes to mental health, and this could allow us to intervene before symptoms become severe.”
Chronic Illnesses and Mental Health: A vicious Cycle
Children with chronic illnesses are at a considerably higher risk of developing mental health problems compared to their healthy peers. The constant demands of managing a chronic condition-including medical appointments, medication adherence, and physical limitations-can be incredibly stressful. This stress can, in turn, exacerbate physical symptoms and create a vicious cycle.
According to the Centre on the developing child at Harvard University, prolonged exposure to stress can disrupt brain development and increase the risk of long-term mental and physical health problems. This is particularly concerning for children, whose brains are still developing.
Conditions Studied
The study focused on children with the following chronic illnesses:
- Diabetes: A metabolic disorder characterized by high blood sugar levels. Learn more about diabetes.
- Arthritis: Inflammation of the joints, causing pain and stiffness.Learn more about arthritis.
- Cystic Fibrosis: A genetic disorder that affects the lungs and digestive system. Learn more about cystic fibrosis