Autism And Diets: Can They Help?

do certain diets help with autism

While there is no scientific evidence that a specific diet improves symptoms of autism, many parents opt for trying different diets for their children with autism. The research community has not ruled out the possibility that diet can affect symptoms of autism, and many parents report that their children's autism symptoms improve when they remove certain foods from their diets. A meta-analysis of scientific studies confirms parental concerns and provides insights into the most common nutritional deficiencies associated with autism. A well-balanced diet with lean proteins, healthy fats, and fibrous foods can be beneficial for those on the autism spectrum to support gut health and brain development.

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Diets that reduce hyperactivity

While there is no scientific evidence that a particular diet improves symptoms of autism, many parents opt for specific food regimens to help manage symptoms.

  • The Feingold diet: This diet reduces artificial food additives and salicylates, which are difficult to detoxify in certain children, contributing to hyperactivity and negative behaviours.
  • Sugar-restricted diets: High sugar intake may contribute to hyperactivity and digestive discomfort in some autistic individuals. However, research on sugar and symptoms of hyperactivity remains mixed. While some studies have reported a modest increase in hyperactivity after eating sugar, others have found no change in symptoms.
  • The ketogenic diet: This diet reduces carbohydrates and replaces them with fats. A small study suggested that a modified ketogenic diet may benefit people with autism.
  • The gluten-free, casein-free (GFCF) diet: This is a popular approach that can be helpful for some individuals with autism.
  • The Mediterranean diet: This diet consists mainly of fruits and vegetables, lean proteins, healthy fats, and complex carbohydrates.
  • The yeast overgrowth management diet: This alternative therapy involves using probiotics, which promote good bacteria in the gut and reduce yeast overgrowth.
  • Omega-3 fatty acid supplements: Children with ADHD may have reduced levels of omega-3 fats, and some research suggests that consuming more omega-3s may modestly improve symptoms.
  • Avoiding food allergens: Removing potential allergens such as gluten, wheat, and soy can improve focus and reduce hyperactivity, especially for those with an allergy or intolerance.
  • Digestive enzymes: These can help break down food, making nutrients more available for absorption and relieving the strain on the digestive system.

It is important to note that there is a lot of overlap between ADHD/hyperactivity and autism. Therefore, diets that reduce hyperactivity in individuals with ADHD may also be applicable to those with autism.

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The ketogenic diet

A small-scale study involving 15 children with autism, aged two to 17, suggested that a modified ketogenic diet may offer benefits for those on the autism spectrum. However, it is important to note that this study had a limited duration of only three months.

When considering the ketogenic diet or any other dietary intervention for autism, it is crucial to approach the topic with careful consideration and seek guidance from healthcare professionals, including registered dietitians, nutritionists, or doctors specialising in autism. These experts can provide valuable insights into the specific nutritional needs and dietary considerations for individuals with autism, ensuring that any dietary changes are safe and effective.

Additionally, it is important to be cautious about potential food allergies and sensitivities. A gradual approach to dietary changes is recommended, as sudden modifications may lead to a deterioration of symptoms. Working with a qualified healthcare professional can help identify and manage any potential risks associated with dietary interventions.

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Gluten-free and casein-free diets

While there is no scientific evidence that a particular diet improves symptoms of autism, many parents opt for specific food regimens to help manage their children's symptoms. One of the most researched dietary therapies is the gluten-free and casein-free (GFCF) diet. Gluten is a protein found in wheat, rye, and barley, as well as foods made from them, such as bread, pasta, biscuits, and breakfast cereals. Casein is a protein found in cow, goat, and sheep's milk, as well as foods made from them, including cream, yoghurt, and cheese. The GFCF diet involves removing all foods containing gluten and casein from the individual's diet.

The idea behind the GFCF diet is to reduce symptoms and improve social and cognitive behaviours and speech. The diet is based on the theory that children with autism may have an allergy or high sensitivity to foods containing gluten or casein. According to the theory, autistic individuals process peptides and proteins in foods containing gluten and casein differently than others. Some believe that the brain treats these proteins like false opiate-like chemicals, and the reaction to these chemicals leads the child to act in a certain way. Researchers have found abnormal levels of peptides in the bodily fluids of some people with autism symptoms. Additionally, Celiac disease, an immune reaction to gluten, is three times more common in children with autism.

There is some anecdotal evidence to support the benefits of the GFCF diet. In a survey of parents of autistic children in England, 19% had tried a gluten and/or milk-free diet, and 43% of these parents reported significant improvements in their child's wellbeing, including bowel habits, general health, sleeping patterns, concentration, and social communication. Some parents of children with autism who follow the GFCF diet report benefits such as changes in speech and behaviour. However, it is important to note that there is a lack of scientific evidence to support the effectiveness of the GFCF diet for autism. Studies demonstrating the beneficial effects of the GFCF diet on ASD patients are limited. Furthermore, the GFCF diet is not without risks. For example, there is an increased risk of inadequate nutrient intake, which could lead to weight loss and poor growth.

Before starting the GFCF diet, it is recommended to consult a doctor or licensed dietitian to ensure the individual still receives a balanced and nutritious diet. It is also important to be aware of hidden sources of gluten, such as fried foods dusted in flour, cosmetics, and some medications. Whole foods such as fruits, vegetables, and nuts may be safe alternatives, but it is crucial to read labels carefully and consult with experts to ensure a safe and effective dietary approach.

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Diets that improve gut health

While there is no scientific evidence that a particular diet improves symptoms of autism, many parents opt for specific food regimens to help manage their children's symptoms. The research community has not ruled out the possibility that diet can affect autism symptoms, and some diets are commonly used for individuals with ASD.

  • Work with a nutritionist: Since most families do not have nutrition training, it is strongly recommended that they work with nutritionists who are familiar with these diets and how to best implement them.
  • Supplement with digestive enzymes: Digestive enzymes help break down food, making nutrients more available for absorption and relieving the strain on the digestive system.
  • Probiotics: Probiotics are microorganisms that promote good bacteria in the gut and reduce yeast overgrowth. Probiotics can be taken as supplements, but whole-food sources are still the best option. Examples of whole-food sources of probiotics include plain Greek yogurt, fermented foods, and tempeh.
  • Prebiotics: Prebiotics are types of fiber that are not digested in the small intestine and instead travel to the colon, where they are fermented to provide sustenance for beneficial bacteria. Examples of prebiotic foods include garlic, mushrooms, and oats.
  • High-fiber foods: Eating a diet high in fiber likely contributes to a healthy gut microbiome. Examples of high-fiber foods include whole grains, leafy greens such as spinach or kale, and aged garlic extract.
  • Collagen-rich foods: Collagen-rich foods such as bone broth and salmon skin may be beneficial for both overall health and gut health.
  • Manage stress and get enough sleep: Chronic high levels of stress and insufficient sleep can have serious impacts on gut health.

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The Feingold diet

Salicylates occur naturally in foods and are found in aspirin. Feingold believed that people allergic or sensitive to aspirin may also be intolerant of salicylate-containing foods. While salicylate sensitivity does exist, there is no evidence of a firm connection between this sensitivity and behavioural issues. Despite anecdotal reports from some proponents, there is little evidence that this diet improves behavioural problems in children with ADHD or other conditions.

The diet involves removing potential triggers by avoiding all foods that may lead to behavioural issues, including artificial flavours, colours, preservatives, sweeteners, and foods containing salicylates. After a set period, certain foods can be slowly reintroduced to see if the child's symptoms return. The diet is meant to be followed for life.

Some experts say the diet may ease ADHD symptoms only in children who are sensitive to these foods. In 2010, a US Food and Drug Administration (FDA) panel released a report based on several studies of the Feingold diet. The report found that artificial food colours, flavours, or preservatives likely only affect children who can't tolerate them, probably because of their genes.

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Frequently asked questions

While there is no scientific evidence that a particular diet improves symptoms of autism, many parents opt for specific food regimens believing they will help. The research community has not ruled out the possibility that diet can affect symptoms of autism, but there is no "one-size-fits-all" diet for autism.

Popular diets for autism include the gluten-free, casein-free (GFCF) diet, the ketogenic or keto diet, and the Feingold diet. The GFCF diet involves removing wheat and dairy products, which can be hard for a child with autism to digest. The keto diet reduces carbohydrates and replaces them with fats, pushing the body into a faster metabolic state called ketosis. The Feingold diet reduces artificial food additives and salicylates, which are thought to contribute to hyperactivity and negative behaviours.

It is recommended to work with a nutritionist or dietitian who is familiar with autism and can help create a diet that the individual will accept and follow. A food diary can be useful for identifying any foods that the individual is sensitive to. It is also important to ensure that the diet includes a wide variety of foods and food groups to improve nutritional intake and prevent deficiencies.

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