L Carnitine: A Comprehensive Guide Outwork Nutrition When to Take L Carnitine for Weight Loss & Maximize Results Healthy 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 l Carnitine reduces reactive oxygen species endoplasmic reticulum stress and maintains mitochondrial function during autophagy mediated cell apoptosis in perfluorooctanesulfonate treated renal tubular cells Scientific Reports PDF) The Effects of L Carnitine L Tartrate Supplementation on Hormonal Responses to Resistance Exercise and Recovery