Frontiers Discovery and validation of acetyl L carnitine in serum for diagnosis of major depressive disorder and remission status through metabolomic approach Acetyl L Carnitine 500mg 60 Capsules (60 Servings) Could a mitochondrial metabolite known as acetyl L carnitine (LAC) yield a new biomarker for depression and potential new therapies? Dr. Carla Nasca, an @nyugrossman assistant professor of psychiatry and of neuroscience and physiology, Acetyl l carnitine deficiency in patients with major depressive disorder PNAS Mitochondria function & Energy I L Carnitine I Life Extension