SYDNEY, February 2 — Australian researchers say hair cortisol autism, a potential biomarker, could help gauge stress in autistic children, offering a biological complement to traditional behaviour assessments. The project, conducted in Sydney and across parts of Australia, involved more than 580 children and adolescents aged 2 to 17, including autistic participants, their non‑autistic siblings, and unrelated non-autistic peers.
The aim was to see whether cortisol levels measured in hair samples can reflect cumulative stress exposure over weeks or months, rather than a single momentary reading. By comparing groups, researchers hoped to tease apart stress linked to autism from other life factors that can influence well‑being. While the concept is promising, early-stage work suggests that more research is needed before such measures can be used routinely in clinics.
Although hair cortisol offers a non-invasive approach to monitoring stress, experts emphasise that data linking cortisol in hair to real-world experiences in autistic youth remain preliminary. The goal is to augment behavioural assessments with a biological context, not to replace clinician observations or family reports.
What we know
- Hair cortisol offers a potential signal of longer-term stress exposure, rather than a snapshot.
- In autism research, biological measures may complement behavioural tools used by clinicians and researchers.
- The study sample included autistic children aged 2–17, plus their non-autistic siblings and unrelated peers, across multiple sites.
- Hair samples are non-invasive and feasible to collect in both clinics and community settings.
- Findings point to a possible role for hair cortisol as part of a broader assessment strategy, pending further validation.
What we don’t know
- How well hair cortisol levels correlate with real-world stress experiences in autistic individuals.
- Whether factors such as age, puberty, gender, or co‑occurring conditions alter hair cortisol readings.
- The thresholds or benchmarks that would indicate meaningful stress in autistic youth.
- How to integrate hair cortisol data with behavioural outcomes in care planning and school support.
- The consistency of hair cortisol signals over time or in response to interventions.
