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 Mark Hyman, MD The Rockefeller University Lack of a single molecule may indicate severe and treatment resistant depression Amazon.com: Kirkman Acetyl L Carnitine 250 mg 90 Capsules Supports Sustained Cellular Energy Production Hypoallergenic : Health & Household Preventive Role of L Carnitine and Balanced Diet in Alzheimer's Disease Frontiers Carnitine and Depression