Frontiers Gut microbiota and autism spectrum disorder: advances in dietary intervention strategies based on the microbiota gut brain axis mechanism Researchers study possible carnitine deficiency, autism link According to a randomized, double blind, placebo controlled clinical trial published in Elsevier journal Research in Autism Spectrum Disorders (2013), l carnitine supplementation demonstrated a significant therapeutic benefit in children diagnosed with The Interplay of Oxidative Stress, Mitochondrial Dysfunction, and Neuroinflammation in Autism Spectrum Disorder: Behavioral Implications and Therapeutic Strategies