Many people will associate autism with traits such as atypical social interactions, repetitive behaviours, and difficulties with speech and communication.

But perhaps lesser known is the fact people with autism are more likely to experience gastrointestinal disorders than the general population.

One review found children with autism were four times more likely to report gastrointestinal symptoms than children without a diagnosis. A number of studies in the review reported the prevalence of gut problems was the same among boys and girls.

These symptoms can include constipation, diarrhoea, abdominal pain, bloating, reflux and vomiting.