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 Brain carnitine deficiency causes nonsyndromic autism with an extreme male bias: A hypothesis Beaudet 2017 BioEssays Wiley Online Library Comprehensive review of the expanding roles of the carnitine pool in metabolic physiology: beyond fatty acid oxidation Journal of Translational Medicine Springer Nature Link Frontiers Gut microbiota and autism spectrum disorder: advances in dietary intervention strategies based on the microbiota gut brain axis mechanism The multifaceted role of mitochondria in autism spectrum disorder Molecular Psychiatry Best Autism Supplements and Vitamins