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Gluten-free Diet Does Not Help Kids with Autism
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Celiac.com 09/21/2015 - A gluten-free diet does nothing to improve behaviors or symptoms of children with autism, according to the results of a study that, though small, is being called the most comprehensive and carefully controlled diet research in autism to date. The study results appear in the Journal of Autism and Developmental Disorders.
The study was conducted by Dr. Susan Hyman and colleagues at the University of Rochester Medical Center. Dr, Hyman is the division chief of neuro-developmental and behavioral pediatrics at the University of Rochester's Kirch Developmental Services Center, which sees some 1,200 children with autism each year.
For the study, a group of preschool children with Autism Spectrum Disorders (ASD) received a gluten-free, casein-free (GFCF) diet.
Hyman's study enrolled 22 children between 2 ½- and 5 ½-years-old. Fourteen children completed the intervention, which was planned for 18 weeks for each family. The families had to strictly adhere to a gluten-free and casein-free diet and participate in early intensive behavioral intervention throughout the study. Children were screened for iron and vitamin D deficiency, milk and wheat allergies and celiac disease. One child was excluded because of a positive test for celiac disease and one was excluded for iron deficiency. Other volunteers who were excluded were unable to adhere to the study requirements. The children's diets were carefully monitored throughout the study to make sure they were getting enough vitamin D, iron, calcium, protein and other nutrients.
After four weeks of being established on diet, the children continued on the diet and were given snacks weekly that contained gluten, casein, neither or both.
In addition to administering a gluten-free casien-free diet, the research team received a full complement of nutrients, such as vitamin D, calcium, iron and high quality protein, which can be lacking in children on gluten-free, casein-free diets.
The kids were given a snack once weekly with either 20 grams of wheat flour, 23 grams of non-fat dried milk, both, or neither until every child received each snack three times. Snacks were carefully engineered to look, taste and feel the same, and were given randomly with no knowledge by staff, families or children.
Parents, teachers and a research assistant filled out standardized surveys about the child's behavior the day before they received the snack, at two and 24 hours after the snack.
However, none of the diet and snack combinations affected children's sleep, bowel habits, or activity.
The team did observe a small increase in the number of times children engaged in social interaction after eating food containing gluten or casein, but this increase did not reach statistical significance. A similar small increase in social language seen after the gluten challenge also did not reach statistical significance.
The team cites the need for larger studies that appropriately monitor for diet and other interventions to determine whether gluten or casein affects social interaction or language among other children with ASD, such as children with gastrointestinal (GI) disease.
For families who wish to eliminate gluten and casein from their child's diet need, the team points out the importance of carefully monitoring the autistic child's nutritional status.
Department of Pediatrics and Clinical Research Center, Golisano Children's Hospital, University of Rochester Medical Center, Rochester, New York
Research Supported By: National Institutes for Mental Health (Studies to Advance Autism Research in Treatment) NIMH U54 MH077397 and the National Center for Research Resources (NCRR) NIH UL1RR024160
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