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Gastro-intestinal is a term used to describe the stomach and other parts of the digestive system.

Many people with autism spectrum disorders are reported to have significant GI problems. For example, they may have stomach aches more often than most people. Or they may suffer from constipation or diarrhoea.

There are various theories about what causes GI problems in people with autism, some of them highly controversial and disputed. For example, some people believe GI problems may actually cause the symptoms of autism but this is not is not widely accepted amongst the scientific community.

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This glossary is designed to explain some of the jargon and gobbledygook used by some people when they talk about autism or research..

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The fact that an intervention is listed in this glossary does not necessarily mean that we agree with its use. Nor does it necessarily mean that there is any scientifically valid or reliable evidence behind it.