Autism Spectrum Disorder

Practice Guidance Toolkit

Key Nutrition Issues


Autism spectrum disorders (ASD) refers to a diverse group of conditions (1). Children and adults with ASDs may have particular communication and social characteristics in common, but the conditions cover a wide spectrum with individual differences in the number and kinds of symptoms, severity of symptoms from mild to severe, age of onset, levels of functioning and challenges with social interactions (1,2).

There are two main categories of ASD diagnostic tools: observations and direct
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Last Updated: 2021-07-14