It's great you're looking into the gut-brain connection in autism! Recent research has revealed some fascinating links between gastrointestinal (GI) issues and ASD. Studies show that GI problems like constipation, diarrhea, and abdominal pain are much more common in children with autism and can impact behavior, social skills, and repetitive actions.

One study even found that children with ASD have fewer neuroactive gut metabolites, which are linked to altered brain activity and emotional regulation. There's also evidence that the severity of GI symptoms can be related to how often repetitive behaviors occur.

To support gut health, focus on balanced nutrition with a variety of foods and consider addressing dietary diversity. The Autism Research Institute has webinars and articles on nutrition, serotonin, and neurotransmitters that you might find helpful: autism.org/resources-on-the-gut-brain-connection-in-autism/