Frontiers Discovery and validation of acetyl L carnitine in serum for diagnosis of major depressive disorder and remission status through metabolomic approach The Rockefeller University Lack of a single molecule may indicate severe and treatment resistant depression Acetyl L Carnitine 500 mg Capsules Exceptional Quality Momentous Plasma acetyl l carnitine and l carnitine in major depressive episodes: a casecontrol study before and after treatment Psychological Medicine Cambridge Core