It's great you're looking into the gut-brain connection in autism! Recent research highlights a strong link between the gut microbiome and autism-related behaviors. Studies have found that imbalances in gut bacteria can affect things like repetitive behaviors, social interaction, and anxiety, potentially through metabolites like serotonin.

For practical steps, consider dietary adjustments such as tryptophan-rich foods and monitor any GI symptoms, as they can worsen behaviors. Some families explore probiotics or FMT under medical advice. For more information, Dr. Kara Gross Margolis has a webinar on the gut-brain connection, and the Autism Research Institute offers an overview of nutrition and interventions. I hope this helps!