• Casein    is a protein found in milk and dairy products. 
• Gluten    is a protein found in wheat, rye, and barley. 
• Soy         is a legume that is often used as a meat substitute. 
• Food additives such as preservatives, artificial colors, and flavors have been linked to autism in some studies. 

It is important to talk to specialists or your doctor who can suggest a test plan to rule out other medical conditions and also may recommend a special diet to help manage their symptoms. There are a number of different autism diets available. Some of the most common diets include: 

• The gluten-free, casein-free diet    eliminates all foods that contain gluten and casein. This is one of the most restrictive autism diets, but it has been shown to be effective in reducing symptoms in some children. 
• The specific carbohydrate diet        eliminates all foods that contain certain types of carbohydrates. This diet is also very restrictive, but it has been shown to be effective in reducing symptoms in some children. 
• The ketogenic diet                                    is a high-fat, low-carbohydrate diet. This diet has been shown to be effective in reducing seizures in children with autism.

 It is important to note that there is no one-size-fits-all autism diet.  For example however, medical practitioners warn that a gluten/casein free diet can be low in fibre, B vitamins and calcium, which can affect overall health. The best diet for your child will depend on their individual needs and this should be done in conjunction with professionals as part of your care plan.

Researchers at Marcus Autism Center at Emory University School of Medicine found that children on the autism spectrum are five times more likely to have mealtime outbursts, be more selective about their food, or have ritualistic eating behaviours.