What is an example of a controversial treatment for autism spectrum disorder that lacks strong research support?

Hyperbaric oxygen treatment is often cited as a controversial intervention for autism spectrum disorder (ASD) primarily because it is based on the premise that increasing oxygen levels can improve neurological functions. However, strong research support for its efficacy in treating ASD is lacking. Studies have not consistently demonstrated clear benefits, leading to skepticism within the scientific and medical communities.

In contrast, medication-assisted therapy is commonly used to address symptoms associated with ASD, and behavioral interventions, such as Applied Behavior Analysis (ABA), have a substantial body of research backing their effectiveness. Cognitive therapy, while also beneficial in various mental health conditions, does not have the same established support when applied directly to the core symptoms of autism. Therefore, hyperbaric oxygen treatment stands out as an example of a treatment that is controversial and not well-supported by empirical evidence in the context of autism spectrum disorder.