Frontiers Discovery and validation of acetyl L carnitine in serum for diagnosis of major depressive disorder and remission status through metabolomic approach Alterations in acylcarnitines, amines, and lipids inform about the mechanism of action of citalopram escitalopram in major depression Translational Psychiatry 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, Amazon.com: aSquared Nutrition Acetyl L Carnitine 1000mg Per Serving Max Strength 200 Veggie Capsules High Dosage Acetyl L Carnitine HCL (ALCAR) Supplement Pills to Support Pure Energy, Brain Function : Health