The supplementation of L carnitine in septic shock patients: Systematic review and meta analysis Clinics L Carnitine Injection Levocarnitine IV Early research into L carnitine was often cited as underwhelming, showing negligible changes in muscle carnitine content and fat loss outcomes. However, these findings may have been limited by a short study window L Carnitine. Boost Weight Loss & Improve Heart Health Frontiers Association between fatigue, peripheral serotonin, and L carnitine in hypothyroidism and in chronic fatigue syndrome LCarnitine Effects Liver Enzymes Consensus