Why do people with Autism often reject certain foods?

Many people with Autism have over-sensitive nervous systems which can cause certain foods to taste, smell or feel unappealing to them. Some people with Autism often have muscle issues that mean that chewing and/or swallowing certain textures are difficult. Sensory based therapy and oral motor therapy can help with these issues. Also, many people with Autism prefer what they know and can be rigid about trying new items. Education and therapy can help.