How Robust is the Evidence for a Role of Oxidative Stress in Autism Spectrum Disorders and Intellectual Disabilities?
Shanna L Burke, Jessica Cobb, Rumi Agarwal and 2 others
PMID 32929662WHAT IT FOUND
While many studies link oxidative stress to autism and intellectual disability, this review finds most rely on flawed biomarkers and methods.
Clinicians should treat current evidence as tentative because the literature lacks robust, validated measurements.
Key findings
01The review concludes that while oxidative stress appears implicated in ASD and IDD, the evidence is weak because many studies used sub-optimal biomarkers, methods, or sample handling.
02Commonly used assays like the simple colorimetric TBARS test are described as fundamentally flawed for assessing oxidative stress because they lack specificity for lipid peroxidation markers.
03Biomarkers often used in ASD research, such as glutathione (GSH), are influenced by factors like diet and metabolism unrelated to oxidative stress, limiting their reliability as standalone measures.
STILL TO COME
How it was doneWhat they found
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What it does not show
This is a narrative review, not a systematic review, so the selection of studies was not strictly protocol-driven and may be subject to bias. The review only included English-language articles. The primary finding is about the quality of existing research, not about a new clinical outcome or treatment effect.
Declared interests
The work was funded by FIU Embrace. No other conflicts of interest are declared in the provided text.
The easy way to misread this
Do not interpret this review as confirming that oxidative stress causes autism or intellectual disability. The authors state that the evidence is weak because most studies used flawed measurement methods. Therefore, you should not recommend antioxidant supplements or dietary changes based on this literature as a proven treatment for ASD or IDD.