Can Lcarnitine be used as a treatment for a child with autism spectrum disorder (especially if a metabolic or mitochondrial abnormality is suspected), and what dosing and safety monitoring are recommended? New autism research: a nutrient called carnitine might counteract gene mutations linked with ASD risks What is the beneficial dose of L Carnitine (L Carnitine) for Autism Spectrum Disorder (ASD)? 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