The Rockefeller University Lack of a single molecule may indicate severe and treatment resistant depression Acetyl L Carnitine PDF) Acetyl L carnitine physical chemical, metabolic, and therapeutic properties: Relevance for its mode of action in Alzheimer's disease and geriatric depression Alterations in acylcarnitines, amines, and lipids inform about the mechanism of action of citalopram escitalopram in major depression Translational Psychiatry